diff --git a/README.md b/README.md
index e16232fa666..56cb25afc40 100644
--- a/README.md
+++ b/README.md
@@ -172,42 +172,42 @@ Stirling PDF currently supports 38!
 
 | Language                                    | Progress                               |
 | ------------------------------------------- | -------------------------------------- |
-| Arabic (العربية) (ar_AR)                    | ![99%](https://geps.dev/progress/99)   |
-| Basque (Euskara) (eu_ES)                    | ![60%](https://geps.dev/progress/60)   |
-| Bulgarian (Български) (bg_BG)               | ![91%](https://geps.dev/progress/91)   |
-| Catalan (Català) (ca_CA)                    | ![47%](https://geps.dev/progress/47)   |
-| Croatian (Hrvatski) (hr_HR)                 | ![91%](https://geps.dev/progress/91)   |
-| Czech (Česky) (cs_CZ)                       | ![87%](https://geps.dev/progress/87)   |
-| Danish (Dansk) (da_DK)                      | ![96%](https://geps.dev/progress/96)   |
-| Dutch (Nederlands) (nl_NL)                  | ![93%](https://geps.dev/progress/93)   |
+| Arabic (العربية) (ar_AR)                    | ![97%](https://geps.dev/progress/97)   |
+| Basque (Euskara) (eu_ES)                    | ![58%](https://geps.dev/progress/58)   |
+| Bulgarian (Български) (bg_BG)               | ![89%](https://geps.dev/progress/89)   |
+| Catalan (Català) (ca_CA)                    | ![46%](https://geps.dev/progress/46)   |
+| Croatian (Hrvatski) (hr_HR)                 | ![89%](https://geps.dev/progress/89)   |
+| Czech (Česky) (cs_CZ)                       | ![85%](https://geps.dev/progress/85)   |
+| Danish (Dansk) (da_DK)                      | ![94%](https://geps.dev/progress/94)   |
+| Dutch (Nederlands) (nl_NL)                  | ![91%](https://geps.dev/progress/91)   |
 | English (English) (en_GB)                   | ![100%](https://geps.dev/progress/100) |
 | English (US) (en_US)                        | ![100%](https://geps.dev/progress/100) |
-| French (Français) (fr_FR)                   | ![90%](https://geps.dev/progress/90)   |
-| German (Deutsch) (de_DE)                    | ![99%](https://geps.dev/progress/99) |
-| Greek (Ελληνικά) (el_GR)                    | ![79%](https://geps.dev/progress/79)   |
-| Hindi (हिंदी) (hi_IN)                          | ![76%](https://geps.dev/progress/76)   |
-| Hungarian (Magyar) (hu_HU)                  | ![73%](https://geps.dev/progress/73)   |
-| Indonesia (Bahasa Indonesia) (id_ID)        | ![74%](https://geps.dev/progress/74)   |
-| Irish (Gaeilge) (ga_IE)                     | ![95%](https://geps.dev/progress/95)   |
+| French (Français) (fr_FR)                   | ![88%](https://geps.dev/progress/88)   |
+| German (Deutsch) (de_DE)                    | ![97%](https://geps.dev/progress/97) |
+| Greek (Ελληνικά) (el_GR)                    | ![78%](https://geps.dev/progress/78)   |
+| Hindi (हिंदी) (hi_IN)                          | ![74%](https://geps.dev/progress/74)   |
+| Hungarian (Magyar) (hu_HU)                  | ![71%](https://geps.dev/progress/71)   |
+| Indonesia (Bahasa Indonesia) (id_ID)        | ![72%](https://geps.dev/progress/72)   |
+| Irish (Gaeilge) (ga_IE)                     | ![93%](https://geps.dev/progress/93)   |
 | Italian (Italiano) (it_IT)                  | ![99%](https://geps.dev/progress/99)   |
-| Japanese (日本語) (ja_JP)                   | ![92%](https://geps.dev/progress/92)   |
-| Korean (한국어) (ko_KR)                     | ![81%](https://geps.dev/progress/81)   |
-| Norwegian (Norsk) (no_NB)                   | ![95%](https://geps.dev/progress/95)   |
-| Polish (Polski) (pl_PL)                     | ![89%](https://geps.dev/progress/89)   |
-| Portuguese (Português) (pt_PT)              | ![76%](https://geps.dev/progress/76)   |
-| Portuguese Brazilian (Português) (pt_BR)    | ![99%](https://geps.dev/progress/99)   |
-| Romanian (Română) (ro_RO)                   | ![97%](https://geps.dev/progress/97)   |
-| Russian (Русский) (ru_RU)                   | ![81%](https://geps.dev/progress/81)   |
-| Serbian Latin alphabet (Srpski) (sr_LATN_RS) | ![76%](https://geps.dev/progress/76)   |
-| Simplified Chinese (简体中文) (zh_CN)       | ![98%](https://geps.dev/progress/98)   |
-| Slovakian (Slovensky) (sk_SK)               | ![89%](https://geps.dev/progress/89)   |
-| Spanish (Español) (es_ES)                   | ![98%](https://geps.dev/progress/98)   |
-| Swedish (Svenska) (sv_SE)                   | ![97%](https://geps.dev/progress/97)   |
-| Thai (ไทย) (th_TH)                          | ![96%](https://geps.dev/progress/96) |
-| Traditional Chinese (繁體中文) (zh_TW)      | ![95%](https://geps.dev/progress/95)   |
-| Turkish (Türkçe) (tr_TR)                    | ![99%](https://geps.dev/progress/99)   |
-| Ukrainian (Українська) (uk_UA)              | ![87%](https://geps.dev/progress/87)   |
-| Vietnamese (Tiếng Việt) (vi_VN)             | ![96%](https://geps.dev/progress/96)   |
+| Japanese (日本語) (ja_JP)                   | ![90%](https://geps.dev/progress/90)   |
+| Korean (한국어) (ko_KR)                     | ![80%](https://geps.dev/progress/80)   |
+| Norwegian (Norsk) (no_NB)                   | ![93%](https://geps.dev/progress/93)   |
+| Polish (Polski) (pl_PL)                     | ![87%](https://geps.dev/progress/87)   |
+| Portuguese (Português) (pt_PT)              | ![74%](https://geps.dev/progress/74)   |
+| Portuguese Brazilian (Português) (pt_BR)    | ![97%](https://geps.dev/progress/97)   |
+| Romanian (Română) (ro_RO)                   | ![95%](https://geps.dev/progress/95)   |
+| Russian (Русский) (ru_RU)                   | ![79%](https://geps.dev/progress/79)   |
+| Serbian Latin alphabet (Srpski) (sr_LATN_RS) | ![74%](https://geps.dev/progress/74)   |
+| Simplified Chinese (简体中文) (zh_CN)       | ![96%](https://geps.dev/progress/96)   |
+| Slovakian (Slovensky) (sk_SK)               | ![87%](https://geps.dev/progress/87)   |
+| Spanish (Español) (es_ES)                   | ![96%](https://geps.dev/progress/96)   |
+| Swedish (Svenska) (sv_SE)                   | ![95%](https://geps.dev/progress/95)   |
+| Thai (ไทย) (th_TH)                          | ![94%](https://geps.dev/progress/94) |
+| Traditional Chinese (繁體中文) (zh_TW)      | ![93%](https://geps.dev/progress/93)   |
+| Turkish (Türkçe) (tr_TR)                    | ![97%](https://geps.dev/progress/97)   |
+| Ukrainian (Українська) (uk_UA)              | ![85%](https://geps.dev/progress/85)   |
+| Vietnamese (Tiếng Việt) (vi_VN)             | ![94%](https://geps.dev/progress/94)   |
 
 ## Contributing (creating issues, translations, fixing bugs, etc.)
 
diff --git a/src/main/java/stirling/software/SPDF/Factories/ReplaceAndInvertColorFactory.java b/src/main/java/stirling/software/SPDF/Factories/ReplaceAndInvertColorFactory.java
new file mode 100644
index 00000000000..6aeb4b2d8b4
--- /dev/null
+++ b/src/main/java/stirling/software/SPDF/Factories/ReplaceAndInvertColorFactory.java
@@ -0,0 +1,39 @@
+package stirling.software.SPDF.Factories;
+
+import org.springframework.stereotype.Component;
+import org.springframework.web.multipart.MultipartFile;
+
+import stirling.software.SPDF.model.api.misc.HighContrastColorCombination;
+import stirling.software.SPDF.model.api.misc.ReplaceAndInvert;
+import stirling.software.SPDF.utils.misc.CustomColorReplaceStrategy;
+import stirling.software.SPDF.utils.misc.InvertFullColorStrategy;
+import stirling.software.SPDF.utils.misc.ReplaceAndInvertColorStrategy;
+
+@Component
+public class ReplaceAndInvertColorFactory {
+
+    public ReplaceAndInvertColorStrategy replaceAndInvert(
+            MultipartFile file,
+            ReplaceAndInvert replaceAndInvertOption,
+            HighContrastColorCombination highContrastColorCombination,
+            String backGroundColor,
+            String textColor) {
+
+        if (replaceAndInvertOption == ReplaceAndInvert.CUSTOM_COLOR
+                || replaceAndInvertOption == ReplaceAndInvert.HIGH_CONTRAST_COLOR) {
+
+            return new CustomColorReplaceStrategy(
+                    file,
+                    replaceAndInvertOption,
+                    textColor,
+                    backGroundColor,
+                    highContrastColorCombination);
+
+        } else if (replaceAndInvertOption == ReplaceAndInvert.FULL_INVERSION) {
+
+            return new InvertFullColorStrategy(file, replaceAndInvertOption);
+        }
+
+        return null;
+    }
+}
diff --git a/src/main/java/stirling/software/SPDF/controller/api/misc/ReplaceAndInvertColorController.java b/src/main/java/stirling/software/SPDF/controller/api/misc/ReplaceAndInvertColorController.java
new file mode 100644
index 00000000000..c7296a1bfaf
--- /dev/null
+++ b/src/main/java/stirling/software/SPDF/controller/api/misc/ReplaceAndInvertColorController.java
@@ -0,0 +1,55 @@
+package stirling.software.SPDF.controller.api.misc;
+
+import java.io.IOException;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.core.io.InputStreamResource;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.MediaType;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.ModelAttribute;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import io.swagger.v3.oas.annotations.Operation;
+
+import stirling.software.SPDF.model.api.misc.ReplaceAndInvertColorRequest;
+import stirling.software.SPDF.service.misc.ReplaceAndInvertColorService;
+
+@RestController
+@RequestMapping("/api/v1/misc")
+public class ReplaceAndInvertColorController {
+
+    private ReplaceAndInvertColorService replaceAndInvertColorService;
+
+    @Autowired
+    public ReplaceAndInvertColorController(
+            ReplaceAndInvertColorService replaceAndInvertColorService) {
+        this.replaceAndInvertColorService = replaceAndInvertColorService;
+    }
+
+    @PostMapping(consumes = "multipart/form-data", value = "/replace-invert-pdf")
+    @Operation(
+            summary = "Replace-Invert Color PDF",
+            description =
+                    "This endpoint accepts a PDF file and option of invert all colors or replace text and background colors. Input:PDF Output:PDF Type:SISO")
+    public ResponseEntity<InputStreamResource> replaceAndInvertColor(
+            @ModelAttribute ReplaceAndInvertColorRequest replaceAndInvertColorRequest)
+            throws IOException {
+
+        InputStreamResource resource =
+                replaceAndInvertColorService.replaceAndInvertColor(
+                        replaceAndInvertColorRequest.getFileInput(),
+                        replaceAndInvertColorRequest.getReplaceAndInvertOption(),
+                        replaceAndInvertColorRequest.getHighContrastColorCombination(),
+                        replaceAndInvertColorRequest.getBackGroundColor(),
+                        replaceAndInvertColorRequest.getTextColor());
+
+        // Return the modified PDF as a downloadable file
+        return ResponseEntity.ok()
+                .header(HttpHeaders.CONTENT_DISPOSITION, "attachment; filename=inverted.pdf")
+                .contentType(MediaType.APPLICATION_PDF)
+                .body(resource);
+    }
+}
diff --git a/src/main/java/stirling/software/SPDF/controller/web/OtherWebController.java b/src/main/java/stirling/software/SPDF/controller/web/OtherWebController.java
index 8b6178bd63a..7f87d4f2260 100644
--- a/src/main/java/stirling/software/SPDF/controller/web/OtherWebController.java
+++ b/src/main/java/stirling/software/SPDF/controller/web/OtherWebController.java
@@ -31,6 +31,13 @@ public String compressPdfForm(Model model) {
         return "misc/compress-pdf";
     }
 
+    @GetMapping("/replace-and-invert-color-pdf")
+    @Hidden
+    public String replaceAndInvertColorPdfForm(Model model) {
+        model.addAttribute("currentPage", "replace-invert-color-pdf");
+        return "misc/replace-color";
+    }
+
     @GetMapping("/extract-image-scans")
     @Hidden
     public ModelAndView extractImageScansForm() {
diff --git a/src/main/java/stirling/software/SPDF/model/api/misc/HighContrastColorCombination.java b/src/main/java/stirling/software/SPDF/model/api/misc/HighContrastColorCombination.java
new file mode 100644
index 00000000000..27c6290bbef
--- /dev/null
+++ b/src/main/java/stirling/software/SPDF/model/api/misc/HighContrastColorCombination.java
@@ -0,0 +1,8 @@
+package stirling.software.SPDF.model.api.misc;
+
+public enum HighContrastColorCombination {
+    WHITE_TEXT_ON_BLACK,
+    BLACK_TEXT_ON_WHITE,
+    YELLOW_TEXT_ON_BLACK,
+    GREEN_TEXT_ON_BLACK,
+}
diff --git a/src/main/java/stirling/software/SPDF/model/api/misc/ReplaceAndInvert.java b/src/main/java/stirling/software/SPDF/model/api/misc/ReplaceAndInvert.java
new file mode 100644
index 00000000000..c3acdc56043
--- /dev/null
+++ b/src/main/java/stirling/software/SPDF/model/api/misc/ReplaceAndInvert.java
@@ -0,0 +1,7 @@
+package stirling.software.SPDF.model.api.misc;
+
+public enum ReplaceAndInvert {
+    HIGH_CONTRAST_COLOR,
+    CUSTOM_COLOR,
+    FULL_INVERSION,
+}
diff --git a/src/main/java/stirling/software/SPDF/model/api/misc/ReplaceAndInvertColorRequest.java b/src/main/java/stirling/software/SPDF/model/api/misc/ReplaceAndInvertColorRequest.java
new file mode 100644
index 00000000000..1d96d35b262
--- /dev/null
+++ b/src/main/java/stirling/software/SPDF/model/api/misc/ReplaceAndInvertColorRequest.java
@@ -0,0 +1,40 @@
+package stirling.software.SPDF.model.api.misc;
+
+import io.swagger.v3.oas.annotations.media.Schema;
+
+import lombok.Data;
+import lombok.EqualsAndHashCode;
+import stirling.software.SPDF.model.api.PDFFile;
+
+@Data
+@EqualsAndHashCode(callSuper = true)
+public class ReplaceAndInvertColorRequest extends PDFFile {
+
+    @Schema(
+            description = "Replace and Invert color options of a pdf.",
+            allowableValues = {"HIGH_CONTRAST_COLOR", "CUSTOM_COLOR", "FULL_INVERSION"})
+    private ReplaceAndInvert replaceAndInvertOption;
+
+    @Schema(
+            description =
+                    "If HIGH_CONTRAST_COLOR option selected, then pick the default color option for text and background.",
+            allowableValues = {
+                "WHITE_TEXT_ON_BLACK",
+                "BLACK_TEXT_ON_WHITE",
+                "YELLOW_TEXT_ON_BLACK",
+                "GREEN_TEXT_ON_BLACK"
+            })
+    private HighContrastColorCombination highContrastColorCombination;
+
+    @Schema(
+            description =
+                    "If CUSTOM_COLOR option selected, then pick the custom color for background. "
+                            + "Expected color value should be 24bit decimal value of a color")
+    private String backGroundColor;
+
+    @Schema(
+            description =
+                    "If CUSTOM_COLOR option selected, then pick the custom color for text. "
+                            + "Expected color value should be 24bit decimal value of a color")
+    private String textColor;
+}
diff --git a/src/main/java/stirling/software/SPDF/service/misc/ReplaceAndInvertColorService.java b/src/main/java/stirling/software/SPDF/service/misc/ReplaceAndInvertColorService.java
new file mode 100644
index 00000000000..29df742a3f5
--- /dev/null
+++ b/src/main/java/stirling/software/SPDF/service/misc/ReplaceAndInvertColorService.java
@@ -0,0 +1,42 @@
+package stirling.software.SPDF.service.misc;
+
+import java.io.IOException;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.core.io.InputStreamResource;
+import org.springframework.stereotype.Service;
+import org.springframework.web.multipart.MultipartFile;
+
+import stirling.software.SPDF.Factories.ReplaceAndInvertColorFactory;
+import stirling.software.SPDF.model.api.misc.HighContrastColorCombination;
+import stirling.software.SPDF.model.api.misc.ReplaceAndInvert;
+import stirling.software.SPDF.utils.misc.ReplaceAndInvertColorStrategy;
+
+@Service
+public class ReplaceAndInvertColorService {
+    private ReplaceAndInvertColorFactory replaceAndInvertColorFactory;
+
+    @Autowired
+    public ReplaceAndInvertColorService(ReplaceAndInvertColorFactory replaceAndInvertColorFactory) {
+        this.replaceAndInvertColorFactory = replaceAndInvertColorFactory;
+    }
+
+    public InputStreamResource replaceAndInvertColor(
+            MultipartFile file,
+            ReplaceAndInvert replaceAndInvertOption,
+            HighContrastColorCombination highContrastColorCombination,
+            String backGroundColor,
+            String textColor)
+            throws IOException {
+
+        ReplaceAndInvertColorStrategy replaceColorStrategy =
+                replaceAndInvertColorFactory.replaceAndInvert(
+                        file,
+                        replaceAndInvertOption,
+                        highContrastColorCombination,
+                        backGroundColor,
+                        textColor);
+
+        return replaceColorStrategy.replace();
+    }
+}
diff --git a/src/main/java/stirling/software/SPDF/utils/misc/CustomColorReplaceStrategy.java b/src/main/java/stirling/software/SPDF/utils/misc/CustomColorReplaceStrategy.java
new file mode 100644
index 00000000000..3c5753f027f
--- /dev/null
+++ b/src/main/java/stirling/software/SPDF/utils/misc/CustomColorReplaceStrategy.java
@@ -0,0 +1,163 @@
+package stirling.software.SPDF.utils.misc;
+
+import java.awt.*;
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.File;
+import java.io.IOException;
+import java.util.List;
+import java.util.Set;
+
+import org.apache.pdfbox.Loader;
+import org.apache.pdfbox.pdmodel.PDDocument;
+import org.apache.pdfbox.pdmodel.PDPage;
+import org.apache.pdfbox.pdmodel.PDPageContentStream;
+import org.apache.pdfbox.pdmodel.PDPageTree;
+import org.apache.pdfbox.pdmodel.font.*;
+import org.apache.pdfbox.text.TextPosition;
+import org.springframework.core.io.InputStreamResource;
+import org.springframework.web.multipart.MultipartFile;
+
+import stirling.software.SPDF.model.api.misc.HighContrastColorCombination;
+import stirling.software.SPDF.model.api.misc.ReplaceAndInvert;
+
+public class CustomColorReplaceStrategy extends ReplaceAndInvertColorStrategy {
+
+    private String textColor;
+    private String backgroundColor;
+    private HighContrastColorCombination highContrastColorCombination;
+
+    public CustomColorReplaceStrategy(
+            MultipartFile file,
+            ReplaceAndInvert replaceAndInvert,
+            String textColor,
+            String backgroundColor,
+            HighContrastColorCombination highContrastColorCombination) {
+        super(file, replaceAndInvert);
+        this.textColor = textColor;
+        this.backgroundColor = backgroundColor;
+        this.highContrastColorCombination = highContrastColorCombination;
+    }
+
+    @Override
+    public InputStreamResource replace() throws IOException {
+
+        // If ReplaceAndInvert is HighContrastColor option, then get the colors of text and
+        // background from static
+        if (replaceAndInvert == ReplaceAndInvert.HIGH_CONTRAST_COLOR) {
+            String[] colors =
+                    HighContrastColorReplaceDecider.getColors(
+                            replaceAndInvert, highContrastColorCombination);
+            this.textColor = colors[0];
+            this.backgroundColor = colors[1];
+        }
+
+        // Create a temporary file, with the original filename from the multipart file
+        File file = File.createTempFile("temp", getFileInput().getOriginalFilename());
+
+        // Transfer the content of the multipart file to the file
+        getFileInput().transferTo(file);
+
+        try (PDDocument document = Loader.loadPDF(file)) {
+
+            PDPageTree pages = document.getPages();
+
+            for (PDPage page : pages) {
+
+                PdfTextStripperCustom pdfTextStripperCustom = new PdfTextStripperCustom();
+                // Get text positions
+                List<List<TextPosition>> charactersByArticle =
+                        pdfTextStripperCustom.processPageCustom(page);
+
+                // Begin a new content stream
+                PDPageContentStream contentStream =
+                        new PDPageContentStream(
+                                document, page, PDPageContentStream.AppendMode.APPEND, true, true);
+
+                // Set the new text color
+                contentStream.setNonStrokingColor(Color.decode(this.textColor));
+
+                // Draw the text with the new color
+                for (List<TextPosition> textPositions : charactersByArticle) {
+                    for (TextPosition text : textPositions) {
+                        // Move to the text position
+                        contentStream.beginText();
+                        contentStream.newLineAtOffset(
+                                text.getX(), page.getMediaBox().getHeight() - text.getY());
+                        PDFont font = null;
+                        String unicodeText = text.getUnicode();
+                        try {
+                            font = PDFontFactory.createFont(text.getFont().getCOSObject());
+                        } catch (IOException io) {
+                            System.out.println("Primary font not found, using fallback font.");
+                            font = new PDType1Font(Standard14Fonts.FontName.HELVETICA);
+                        }
+                        // if a character is not supported by font, then look for supported font
+                        try {
+                            byte[] bytes = font.encode(unicodeText);
+                        } catch (IOException io) {
+                            System.out.println("text could not be encoded ");
+                            font = checkSupportedFontForCharacter(unicodeText);
+                        } catch (IllegalArgumentException ie) {
+                            System.out.println("text not supported by font ");
+                            font = checkSupportedFontForCharacter(unicodeText);
+                        } finally {
+                            // if any other font is not supported, then replace default character *
+                            if (font == null) {
+                                font = new PDType1Font(Standard14Fonts.FontName.HELVETICA);
+                                unicodeText = "*";
+                            }
+                        }
+                        contentStream.setFont(font, text.getFontSize());
+                        contentStream.showText(unicodeText);
+                        contentStream.endText();
+                    }
+                }
+                // Close the content stream
+                contentStream.close();
+                // Use a content stream to overlay the background color
+                try (PDPageContentStream contentStreamBg =
+                        new PDPageContentStream(
+                                document,
+                                page,
+                                PDPageContentStream.AppendMode.PREPEND,
+                                true,
+                                true)) {
+                    // Set background color (e.g., light yellow)
+                    contentStreamBg.setNonStrokingColor(Color.decode(this.backgroundColor));
+                    contentStreamBg.addRect(
+                            0, 0, page.getMediaBox().getWidth(), page.getMediaBox().getHeight());
+                    contentStreamBg.fill();
+                }
+            }
+            // Save the modified PDF to a ByteArrayOutputStream
+            ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
+            document.save(byteArrayOutputStream);
+            document.close();
+
+            // Prepare the modified PDF for download
+            ByteArrayInputStream inputStream =
+                    new ByteArrayInputStream(byteArrayOutputStream.toByteArray());
+            InputStreamResource resource = new InputStreamResource(inputStream);
+            return resource;
+        }
+    }
+
+    private PDFont checkSupportedFontForCharacter(String unicodeText) {
+
+        Set<String> fonts = Standard14Fonts.getNames();
+        for (String font : fonts) {
+            Standard14Fonts.FontName fontName = Standard14Fonts.getMappedFontName(font);
+            PDFont currentFont = new PDType1Font(fontName);
+            try {
+                byte[] bytes = currentFont.encode(unicodeText);
+                return currentFont;
+            } catch (IOException io) {
+                System.out.println("text could not be encoded ");
+            } catch (IllegalArgumentException ie) {
+                System.out.println("text not supported by font ");
+            }
+        }
+        return null;
+    }
+}
diff --git a/src/main/java/stirling/software/SPDF/utils/misc/HighContrastColorReplaceDecider.java b/src/main/java/stirling/software/SPDF/utils/misc/HighContrastColorReplaceDecider.java
new file mode 100644
index 00000000000..70d226b5555
--- /dev/null
+++ b/src/main/java/stirling/software/SPDF/utils/misc/HighContrastColorReplaceDecider.java
@@ -0,0 +1,30 @@
+package stirling.software.SPDF.utils.misc;
+
+import stirling.software.SPDF.model.api.misc.HighContrastColorCombination;
+import stirling.software.SPDF.model.api.misc.ReplaceAndInvert;
+
+public class HighContrastColorReplaceDecider {
+
+    // To decide the text and background colors for High contrast color option for replace-invert
+    // color feature
+    public static String[] getColors(
+            ReplaceAndInvert replaceAndInvert,
+            HighContrastColorCombination highContrastColorCombination) {
+
+        if (highContrastColorCombination == HighContrastColorCombination.BLACK_TEXT_ON_WHITE) {
+            return new String[] {"0", "16777215"};
+        } else if (highContrastColorCombination
+                == HighContrastColorCombination.GREEN_TEXT_ON_BLACK) {
+            return new String[] {"65280", "0"};
+        } else if (highContrastColorCombination
+                == HighContrastColorCombination.WHITE_TEXT_ON_BLACK) {
+            return new String[] {"16777215", "0"};
+        } else if (highContrastColorCombination
+                == HighContrastColorCombination.YELLOW_TEXT_ON_BLACK) {
+
+            return new String[] {"16776960", "0"};
+        }
+
+        return null;
+    }
+}
diff --git a/src/main/java/stirling/software/SPDF/utils/misc/InvertFullColorStrategy.java b/src/main/java/stirling/software/SPDF/utils/misc/InvertFullColorStrategy.java
new file mode 100644
index 00000000000..12cd5204fbf
--- /dev/null
+++ b/src/main/java/stirling/software/SPDF/utils/misc/InvertFullColorStrategy.java
@@ -0,0 +1,104 @@
+package stirling.software.SPDF.utils.misc;
+
+import java.awt.*;
+import java.awt.image.BufferedImage;
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.File;
+import java.io.IOException;
+
+import javax.imageio.ImageIO;
+
+import org.apache.pdfbox.Loader;
+import org.apache.pdfbox.pdmodel.PDDocument;
+import org.apache.pdfbox.pdmodel.PDPage;
+import org.apache.pdfbox.pdmodel.PDPageContentStream;
+import org.apache.pdfbox.pdmodel.graphics.image.PDImageXObject;
+import org.apache.pdfbox.rendering.PDFRenderer;
+import org.springframework.core.io.InputStreamResource;
+import org.springframework.web.multipart.MultipartFile;
+
+import stirling.software.SPDF.model.api.misc.ReplaceAndInvert;
+
+public class InvertFullColorStrategy extends ReplaceAndInvertColorStrategy {
+
+    public InvertFullColorStrategy(MultipartFile file, ReplaceAndInvert replaceAndInvert) {
+        super(file, replaceAndInvert);
+    }
+
+    @Override
+    public InputStreamResource replace() throws IOException {
+
+        // Create a temporary file, with the original filename from the multipart file
+        File file = File.createTempFile("temp", getFileInput().getOriginalFilename());
+
+        // Transfer the content of the multipart file to the file
+        getFileInput().transferTo(file);
+
+        // Load the uploaded PDF
+        PDDocument document = Loader.loadPDF(file);
+
+        // Render each page and invert colors
+        PDFRenderer pdfRenderer = new PDFRenderer(document);
+        for (int page = 0; page < document.getNumberOfPages(); page++) {
+            BufferedImage image =
+                    pdfRenderer.renderImageWithDPI(page, 300); // Render page at 300 DPI
+
+            // Invert the colors
+            invertImageColors(image);
+
+            // Create a new PDPage from the inverted image
+            PDPage pdPage = document.getPage(page);
+            PDImageXObject pdImage =
+                    PDImageXObject.createFromFileByContent(
+                            convertToBufferedImageTpFile(image), document);
+
+            PDPageContentStream contentStream =
+                    new PDPageContentStream(
+                            document, pdPage, PDPageContentStream.AppendMode.OVERWRITE, true);
+            contentStream.drawImage(
+                    pdImage,
+                    0,
+                    0,
+                    pdPage.getMediaBox().getWidth(),
+                    pdPage.getMediaBox().getHeight());
+            contentStream.close();
+        }
+
+        // Save the modified PDF to a ByteArrayOutputStream
+        ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
+        document.save(byteArrayOutputStream);
+        document.close();
+
+        // Prepare the modified PDF for download
+        ByteArrayInputStream inputStream =
+                new ByteArrayInputStream(byteArrayOutputStream.toByteArray());
+        InputStreamResource resource = new InputStreamResource(inputStream);
+        return resource;
+    }
+
+    // Method to invert image colors
+    private void invertImageColors(BufferedImage image) {
+        int width = image.getWidth();
+        int height = image.getHeight();
+        for (int x = 0; x < width; x++) {
+            for (int y = 0; y < height; y++) {
+                int rgba = image.getRGB(x, y);
+                Color color = new Color(rgba, true);
+                Color invertedColor =
+                        new Color(
+                                255 - color.getRed(),
+                                255 - color.getGreen(),
+                                255 - color.getBlue());
+                image.setRGB(x, y, invertedColor.getRGB());
+            }
+        }
+    }
+
+    // Helper method to convert BufferedImage to InputStream
+    private File convertToBufferedImageTpFile(BufferedImage image) throws IOException {
+        File file = new File("image.png");
+        ImageIO.write(image, "png", file);
+        return file;
+    }
+}
diff --git a/src/main/java/stirling/software/SPDF/utils/misc/PdfTextStripperCustom.java b/src/main/java/stirling/software/SPDF/utils/misc/PdfTextStripperCustom.java
new file mode 100644
index 00000000000..291acf5e3f3
--- /dev/null
+++ b/src/main/java/stirling/software/SPDF/utils/misc/PdfTextStripperCustom.java
@@ -0,0 +1,36 @@
+package stirling.software.SPDF.utils.misc;
+
+import java.awt.geom.Rectangle2D;
+import java.io.IOException;
+import java.util.List;
+
+import org.apache.pdfbox.pdmodel.PDPage;
+import org.apache.pdfbox.text.PDFTextStripperByArea;
+import org.apache.pdfbox.text.TextPosition;
+
+public class PdfTextStripperCustom extends PDFTextStripperByArea {
+
+    /**
+     * Constructor.
+     *
+     * @throws IOException If there is an error loading properties.
+     */
+    public PdfTextStripperCustom() throws IOException {}
+
+    // To process the page text using stripper and returns the TextPosition and its values
+    public List<List<TextPosition>> processPageCustom(PDPage page) throws IOException {
+
+        addRegion(
+                "wholePage",
+                new Rectangle2D.Float(
+                        page.getMediaBox().getLowerLeftX(),
+                        page.getMediaBox().getLowerLeftY(),
+                        page.getMediaBox().getWidth(),
+                        page.getMediaBox().getHeight()));
+        extractRegions(page);
+
+        List<List<TextPosition>> textPositions = getCharactersByArticle();
+
+        return textPositions;
+    }
+}
diff --git a/src/main/java/stirling/software/SPDF/utils/misc/ReplaceAndInvertColorStrategy.java b/src/main/java/stirling/software/SPDF/utils/misc/ReplaceAndInvertColorStrategy.java
new file mode 100644
index 00000000000..87590731465
--- /dev/null
+++ b/src/main/java/stirling/software/SPDF/utils/misc/ReplaceAndInvertColorStrategy.java
@@ -0,0 +1,24 @@
+package stirling.software.SPDF.utils.misc;
+
+import java.io.IOException;
+
+import org.springframework.core.io.InputStreamResource;
+import org.springframework.web.multipart.MultipartFile;
+
+import lombok.Data;
+import stirling.software.SPDF.model.api.PDFFile;
+import stirling.software.SPDF.model.api.misc.ReplaceAndInvert;
+
+@Data
+// @EqualsAndHashCode(callSuper = true)
+public abstract class ReplaceAndInvertColorStrategy extends PDFFile {
+
+    protected ReplaceAndInvert replaceAndInvert;
+
+    public ReplaceAndInvertColorStrategy(MultipartFile file, ReplaceAndInvert replaceAndInvert) {
+        setFileInput(file);
+        setReplaceAndInvert(replaceAndInvert);
+    }
+
+    public abstract InputStreamResource replace() throws IOException;
+}
diff --git a/src/main/resources/messages_ar_AR.properties b/src/main/resources/messages_ar_AR.properties
index 284c4353454..19fe9944553 100644
--- a/src/main/resources/messages_ar_AR.properties
+++ b/src/main/resources/messages_ar_AR.properties
@@ -76,6 +76,8 @@ donate=تبرع
 color=لون
 sponsor=راعٍ
 info=معلومات
+page=Page
+pages=Pages
 
 legal.privacy=Privacy Policy
 legal.terms=Terms and Conditions
@@ -480,6 +482,26 @@ home.removeImagePdf.title=إزالة الصورة
 home.removeImagePdf.desc=إزالة الصورة من PDF لتقليل حجم الملف
 removeImagePdf.tags=إزالة الصورة,عمليات الصفحة,الخلفية,جانب الخادم
 
+#replace-invert-color
+replace-color.title=Replace-Invert-Color
+replace-color.header=Replace-Invert Color PDF
+home.replaceColorPdf.title=Replace and Invert Color
+home.replaceColorPdf.desc=Replace color for text and background in PDF and invert full color of pdf to reduce file size
+replaceColorPdf.tags=Replace Color,Page operations,Back end,server side
+replace-color.selectText.1=Replace or Invert color Options
+replace-color.selectText.2=Default(Default high contrast colors)
+replace-color.selectText.3=Custom(Customized colors)
+replace-color.selectText.4=Full-Invert(Invert all colors)
+replace-color.selectText.5=High contrast color options
+replace-color.selectText.6=white text on black background
+replace-color.selectText.7=Black text on white background
+replace-color.selectText.8=Yellow text on black background
+replace-color.selectText.9=Green text on black background
+replace-color.selectText.10=Choose text Color
+replace-color.selectText.11=Choose background Color
+replace-color.submit=Replace
+
+
 
 ###########################
 #                         #
diff --git a/src/main/resources/messages_bg_BG.properties b/src/main/resources/messages_bg_BG.properties
index e6df3a6c83e..2e224ba7494 100644
--- a/src/main/resources/messages_bg_BG.properties
+++ b/src/main/resources/messages_bg_BG.properties
@@ -76,6 +76,8 @@ donate=Направете дарение
 color=Цвят
 sponsor=Спонсор
 info=Info
+page=Page
+pages=Pages
 
 legal.privacy=Privacy Policy
 legal.terms=Terms and Conditions
@@ -480,6 +482,26 @@ home.removeImagePdf.title=Remove image
 home.removeImagePdf.desc=Remove image from PDF to reduce file size
 removeImagePdf.tags=Remove Image,Page operations,Back end,server side
 
+#replace-invert-color
+replace-color.title=Replace-Invert-Color
+replace-color.header=Replace-Invert Color PDF
+home.replaceColorPdf.title=Replace and Invert Color
+home.replaceColorPdf.desc=Replace color for text and background in PDF and invert full color of pdf to reduce file size
+replaceColorPdf.tags=Replace Color,Page operations,Back end,server side
+replace-color.selectText.1=Replace or Invert color Options
+replace-color.selectText.2=Default(Default high contrast colors)
+replace-color.selectText.3=Custom(Customized colors)
+replace-color.selectText.4=Full-Invert(Invert all colors)
+replace-color.selectText.5=High contrast color options
+replace-color.selectText.6=white text on black background
+replace-color.selectText.7=Black text on white background
+replace-color.selectText.8=Yellow text on black background
+replace-color.selectText.9=Green text on black background
+replace-color.selectText.10=Choose text Color
+replace-color.selectText.11=Choose background Color
+replace-color.submit=Replace
+
+
 
 ###########################
 #                         #
diff --git a/src/main/resources/messages_ca_CA.properties b/src/main/resources/messages_ca_CA.properties
index 43647bd8323..48ffcb693cb 100644
--- a/src/main/resources/messages_ca_CA.properties
+++ b/src/main/resources/messages_ca_CA.properties
@@ -76,6 +76,8 @@ donate=Donate
 color=Color
 sponsor=Sponsor
 info=Info
+page=Page
+pages=Pages
 
 legal.privacy=Privacy Policy
 legal.terms=Terms and Conditions
@@ -480,6 +482,26 @@ home.removeImagePdf.title=Remove image
 home.removeImagePdf.desc=Remove image from PDF to reduce file size
 removeImagePdf.tags=Remove Image,Page operations,Back end,server side
 
+#replace-invert-color
+replace-color.title=Replace-Invert-Color
+replace-color.header=Replace-Invert Color PDF
+home.replaceColorPdf.title=Replace and Invert Color
+home.replaceColorPdf.desc=Replace color for text and background in PDF and invert full color of pdf to reduce file size
+replaceColorPdf.tags=Replace Color,Page operations,Back end,server side
+replace-color.selectText.1=Replace or Invert color Options
+replace-color.selectText.2=Default(Default high contrast colors)
+replace-color.selectText.3=Custom(Customized colors)
+replace-color.selectText.4=Full-Invert(Invert all colors)
+replace-color.selectText.5=High contrast color options
+replace-color.selectText.6=white text on black background
+replace-color.selectText.7=Black text on white background
+replace-color.selectText.8=Yellow text on black background
+replace-color.selectText.9=Green text on black background
+replace-color.selectText.10=Choose text Color
+replace-color.selectText.11=Choose background Color
+replace-color.submit=Replace
+
+
 
 ###########################
 #                         #
diff --git a/src/main/resources/messages_cs_CZ.properties b/src/main/resources/messages_cs_CZ.properties
index dba3c988dce..4f4ec782132 100644
--- a/src/main/resources/messages_cs_CZ.properties
+++ b/src/main/resources/messages_cs_CZ.properties
@@ -76,6 +76,8 @@ donate=Přispějte
 color=Barva
 sponsor=Sponzor
 info=Info
+page=Page
+pages=Pages
 
 legal.privacy=Privacy Policy
 legal.terms=Terms and Conditions
@@ -480,6 +482,26 @@ home.removeImagePdf.title=Remove image
 home.removeImagePdf.desc=Remove image from PDF to reduce file size
 removeImagePdf.tags=Remove Image,Page operations,Back end,server side
 
+#replace-invert-color
+replace-color.title=Replace-Invert-Color
+replace-color.header=Replace-Invert Color PDF
+home.replaceColorPdf.title=Replace and Invert Color
+home.replaceColorPdf.desc=Replace color for text and background in PDF and invert full color of pdf to reduce file size
+replaceColorPdf.tags=Replace Color,Page operations,Back end,server side
+replace-color.selectText.1=Replace or Invert color Options
+replace-color.selectText.2=Default(Default high contrast colors)
+replace-color.selectText.3=Custom(Customized colors)
+replace-color.selectText.4=Full-Invert(Invert all colors)
+replace-color.selectText.5=High contrast color options
+replace-color.selectText.6=white text on black background
+replace-color.selectText.7=Black text on white background
+replace-color.selectText.8=Yellow text on black background
+replace-color.selectText.9=Green text on black background
+replace-color.selectText.10=Choose text Color
+replace-color.selectText.11=Choose background Color
+replace-color.submit=Replace
+
+
 
 ###########################
 #                         #
diff --git a/src/main/resources/messages_da_DK.properties b/src/main/resources/messages_da_DK.properties
index 4f914d7ede2..7e2c4538d9e 100644
--- a/src/main/resources/messages_da_DK.properties
+++ b/src/main/resources/messages_da_DK.properties
@@ -76,6 +76,8 @@ donate=Donér
 color=Farve
 sponsor=Sponsor
 info=Info
+page=Page
+pages=Pages
 
 legal.privacy=Privacy Policy
 legal.terms=Terms and Conditions
@@ -480,6 +482,26 @@ home.removeImagePdf.title=Fjern billede
 home.removeImagePdf.desc=Fjern billede fra PDF for at reducere filstørrelse
 removeImagePdf.tags=Fjern Billede,Sideoperationer,Back end,server side
 
+#replace-invert-color
+replace-color.title=Replace-Invert-Color
+replace-color.header=Replace-Invert Color PDF
+home.replaceColorPdf.title=Replace and Invert Color
+home.replaceColorPdf.desc=Replace color for text and background in PDF and invert full color of pdf to reduce file size
+replaceColorPdf.tags=Replace Color,Page operations,Back end,server side
+replace-color.selectText.1=Replace or Invert color Options
+replace-color.selectText.2=Default(Default high contrast colors)
+replace-color.selectText.3=Custom(Customized colors)
+replace-color.selectText.4=Full-Invert(Invert all colors)
+replace-color.selectText.5=High contrast color options
+replace-color.selectText.6=white text on black background
+replace-color.selectText.7=Black text on white background
+replace-color.selectText.8=Yellow text on black background
+replace-color.selectText.9=Green text on black background
+replace-color.selectText.10=Choose text Color
+replace-color.selectText.11=Choose background Color
+replace-color.submit=Replace
+
+
 
 ###########################
 #                         #
diff --git a/src/main/resources/messages_de_DE.properties b/src/main/resources/messages_de_DE.properties
index 754745a299b..e156dbf2a0b 100644
--- a/src/main/resources/messages_de_DE.properties
+++ b/src/main/resources/messages_de_DE.properties
@@ -76,6 +76,8 @@ donate=Spenden
 color=Farbe
 sponsor=Sponsor
 info=Informationen
+page=Page
+pages=Pages
 
 legal.privacy=Datenschutz
 legal.terms=AGB
@@ -480,6 +482,26 @@ home.removeImagePdf.title=Bild entfernen
 home.removeImagePdf.desc=Bild aus PDF entfernen, um die Dateigröße zu verringern
 removeImagePdf.tags=bild entfernen,seitenoperationen,back end,server side
 
+#replace-invert-color
+replace-color.title=Replace-Invert-Color
+replace-color.header=Replace-Invert Color PDF
+home.replaceColorPdf.title=Replace and Invert Color
+home.replaceColorPdf.desc=Replace color for text and background in PDF and invert full color of pdf to reduce file size
+replaceColorPdf.tags=Replace Color,Page operations,Back end,server side
+replace-color.selectText.1=Replace or Invert color Options
+replace-color.selectText.2=Default(Default high contrast colors)
+replace-color.selectText.3=Custom(Customized colors)
+replace-color.selectText.4=Full-Invert(Invert all colors)
+replace-color.selectText.5=High contrast color options
+replace-color.selectText.6=white text on black background
+replace-color.selectText.7=Black text on white background
+replace-color.selectText.8=Yellow text on black background
+replace-color.selectText.9=Green text on black background
+replace-color.selectText.10=Choose text Color
+replace-color.selectText.11=Choose background Color
+replace-color.submit=Replace
+
+
 
 ###########################
 #                         #
diff --git a/src/main/resources/messages_el_GR.properties b/src/main/resources/messages_el_GR.properties
index c48b8564d31..b19770e0e9b 100644
--- a/src/main/resources/messages_el_GR.properties
+++ b/src/main/resources/messages_el_GR.properties
@@ -76,6 +76,8 @@ donate=Δωρισε
 color=Χρώμα
 sponsor=Yποστηρικτής
 info=Info
+page=Page
+pages=Pages
 
 legal.privacy=Privacy Policy
 legal.terms=Terms and Conditions
@@ -480,6 +482,26 @@ home.removeImagePdf.title=Remove image
 home.removeImagePdf.desc=Remove image from PDF to reduce file size
 removeImagePdf.tags=Remove Image,Page operations,Back end,server side
 
+#replace-invert-color
+replace-color.title=Replace-Invert-Color
+replace-color.header=Replace-Invert Color PDF
+home.replaceColorPdf.title=Replace and Invert Color
+home.replaceColorPdf.desc=Replace color for text and background in PDF and invert full color of pdf to reduce file size
+replaceColorPdf.tags=Replace Color,Page operations,Back end,server side
+replace-color.selectText.1=Replace or Invert color Options
+replace-color.selectText.2=Default(Default high contrast colors)
+replace-color.selectText.3=Custom(Customized colors)
+replace-color.selectText.4=Full-Invert(Invert all colors)
+replace-color.selectText.5=High contrast color options
+replace-color.selectText.6=white text on black background
+replace-color.selectText.7=Black text on white background
+replace-color.selectText.8=Yellow text on black background
+replace-color.selectText.9=Green text on black background
+replace-color.selectText.10=Choose text Color
+replace-color.selectText.11=Choose background Color
+replace-color.submit=Replace
+
+
 
 ###########################
 #                         #
diff --git a/src/main/resources/messages_en_GB.properties b/src/main/resources/messages_en_GB.properties
index ecfec8207da..dbebccc0154 100644
--- a/src/main/resources/messages_en_GB.properties
+++ b/src/main/resources/messages_en_GB.properties
@@ -76,6 +76,8 @@ donate=Donate
 color=Color
 sponsor=Sponsor
 info=Info
+page=Page
+pages=Pages
 
 legal.privacy=Privacy Policy
 legal.terms=Terms and Conditions
@@ -480,6 +482,26 @@ home.removeImagePdf.title=Remove image
 home.removeImagePdf.desc=Remove image from PDF to reduce file size
 removeImagePdf.tags=Remove Image,Page operations,Back end,server side
 
+#replace-invert-color
+replace-color.title=Replace-Invert-Color
+replace-color.header=Replace-Invert Color PDF
+home.replaceColorPdf.title=Replace and Invert Color
+home.replaceColorPdf.desc=Replace color for text and background in PDF and invert full color of pdf to reduce file size
+replaceColorPdf.tags=Replace Color,Page operations,Back end,server side
+replace-color.selectText.1=Replace or Invert color Options
+replace-color.selectText.2=Default(Default high contrast colors)
+replace-color.selectText.3=Custom(Customized colors)
+replace-color.selectText.4=Full-Invert(Invert all colors)
+replace-color.selectText.5=High contrast color options
+replace-color.selectText.6=white text on black background
+replace-color.selectText.7=Black text on white background
+replace-color.selectText.8=Yellow text on black background
+replace-color.selectText.9=Green text on black background
+replace-color.selectText.10=Choose text Color
+replace-color.selectText.11=Choose background Color
+replace-color.submit=Replace
+
+
 
 ###########################
 #                         #
diff --git a/src/main/resources/messages_en_US.properties b/src/main/resources/messages_en_US.properties
index 027530b2276..6ea5dd95996 100644
--- a/src/main/resources/messages_en_US.properties
+++ b/src/main/resources/messages_en_US.properties
@@ -76,6 +76,8 @@ donate=Donate
 color=Color
 sponsor=Sponsor
 info=Info
+page=Page
+pages=Pages
 
 legal.privacy=Privacy Policy
 legal.terms=Terms and Conditions
@@ -480,6 +482,26 @@ home.removeImagePdf.title=Remove image
 home.removeImagePdf.desc=Remove image from PDF to reduce file size
 removeImagePdf.tags=Remove Image,Page operations,Back end,server side
 
+#replace-invert-color
+replace-color.title=Replace-Invert-Color
+replace-color.header=Replace-Invert Color PDF
+home.replaceColorPdf.title=Replace and Invert Color
+home.replaceColorPdf.desc=Replace color for text and background in PDF and invert full color of pdf to reduce file size
+replaceColorPdf.tags=Replace Color,Page operations,Back end,server side
+replace-color.selectText.1=Replace or Invert color Options
+replace-color.selectText.2=Default(Default high contrast colors)
+replace-color.selectText.3=Custom(Customized colors)
+replace-color.selectText.4=Full-Invert(Invert all colors)
+replace-color.selectText.5=High contrast color options
+replace-color.selectText.6=white text on black background
+replace-color.selectText.7=Black text on white background
+replace-color.selectText.8=Yellow text on black background
+replace-color.selectText.9=Green text on black background
+replace-color.selectText.10=Choose text Color
+replace-color.selectText.11=Choose background Color
+replace-color.submit=Replace
+
+
 
 ###########################
 #                         #
diff --git a/src/main/resources/messages_es_ES.properties b/src/main/resources/messages_es_ES.properties
index 7c0e8b0c3d1..5274fc1d2e2 100644
--- a/src/main/resources/messages_es_ES.properties
+++ b/src/main/resources/messages_es_ES.properties
@@ -76,6 +76,8 @@ donate=Donar
 color=Color
 sponsor=Patrocinador
 info=Info
+page=Page
+pages=Pages
 
 legal.privacy=Privacy Policy
 legal.terms=Terms and Conditions
@@ -480,6 +482,26 @@ home.removeImagePdf.title=Eliminar imagen
 home.removeImagePdf.desc=Eliminar imagen del PDF> para reducir el tamaño de archivo
 removeImagePdf.tags=Eliminar imagen,Operaciones de página,Back end,lado del servidor
 
+#replace-invert-color
+replace-color.title=Replace-Invert-Color
+replace-color.header=Replace-Invert Color PDF
+home.replaceColorPdf.title=Replace and Invert Color
+home.replaceColorPdf.desc=Replace color for text and background in PDF and invert full color of pdf to reduce file size
+replaceColorPdf.tags=Replace Color,Page operations,Back end,server side
+replace-color.selectText.1=Replace or Invert color Options
+replace-color.selectText.2=Default(Default high contrast colors)
+replace-color.selectText.3=Custom(Customized colors)
+replace-color.selectText.4=Full-Invert(Invert all colors)
+replace-color.selectText.5=High contrast color options
+replace-color.selectText.6=white text on black background
+replace-color.selectText.7=Black text on white background
+replace-color.selectText.8=Yellow text on black background
+replace-color.selectText.9=Green text on black background
+replace-color.selectText.10=Choose text Color
+replace-color.selectText.11=Choose background Color
+replace-color.submit=Replace
+
+
 
 ###########################
 #                         #
diff --git a/src/main/resources/messages_eu_ES.properties b/src/main/resources/messages_eu_ES.properties
index c8e3b8f3a84..792955c3262 100644
--- a/src/main/resources/messages_eu_ES.properties
+++ b/src/main/resources/messages_eu_ES.properties
@@ -76,6 +76,8 @@ donate=Donate
 color=Color
 sponsor=Sponsor
 info=Info
+page=Page
+pages=Pages
 
 legal.privacy=Privacy Policy
 legal.terms=Terms and Conditions
@@ -480,6 +482,26 @@ home.removeImagePdf.title=Remove image
 home.removeImagePdf.desc=Remove image from PDF to reduce file size
 removeImagePdf.tags=Remove Image,Page operations,Back end,server side
 
+#replace-invert-color
+replace-color.title=Replace-Invert-Color
+replace-color.header=Replace-Invert Color PDF
+home.replaceColorPdf.title=Replace and Invert Color
+home.replaceColorPdf.desc=Replace color for text and background in PDF and invert full color of pdf to reduce file size
+replaceColorPdf.tags=Replace Color,Page operations,Back end,server side
+replace-color.selectText.1=Replace or Invert color Options
+replace-color.selectText.2=Default(Default high contrast colors)
+replace-color.selectText.3=Custom(Customized colors)
+replace-color.selectText.4=Full-Invert(Invert all colors)
+replace-color.selectText.5=High contrast color options
+replace-color.selectText.6=white text on black background
+replace-color.selectText.7=Black text on white background
+replace-color.selectText.8=Yellow text on black background
+replace-color.selectText.9=Green text on black background
+replace-color.selectText.10=Choose text Color
+replace-color.selectText.11=Choose background Color
+replace-color.submit=Replace
+
+
 
 ###########################
 #                         #
diff --git a/src/main/resources/messages_fr_FR.properties b/src/main/resources/messages_fr_FR.properties
index 3e78e7a3f70..ee00bb486ad 100644
--- a/src/main/resources/messages_fr_FR.properties
+++ b/src/main/resources/messages_fr_FR.properties
@@ -76,6 +76,8 @@ donate=Faire un don
 color=Couleur
 sponsor=Sponsor
 info=Info
+page=Page
+pages=Pages
 
 legal.privacy=Privacy Policy
 legal.terms=Terms and Conditions
@@ -480,6 +482,26 @@ home.removeImagePdf.title=Remove image
 home.removeImagePdf.desc=Remove image from PDF to reduce file size
 removeImagePdf.tags=Remove Image,Page operations,Back end,server side
 
+#replace-invert-color
+replace-color.title=Replace-Invert-Color
+replace-color.header=Replace-Invert Color PDF
+home.replaceColorPdf.title=Replace and Invert Color
+home.replaceColorPdf.desc=Replace color for text and background in PDF and invert full color of pdf to reduce file size
+replaceColorPdf.tags=Replace Color,Page operations,Back end,server side
+replace-color.selectText.1=Replace or Invert color Options
+replace-color.selectText.2=Default(Default high contrast colors)
+replace-color.selectText.3=Custom(Customized colors)
+replace-color.selectText.4=Full-Invert(Invert all colors)
+replace-color.selectText.5=High contrast color options
+replace-color.selectText.6=white text on black background
+replace-color.selectText.7=Black text on white background
+replace-color.selectText.8=Yellow text on black background
+replace-color.selectText.9=Green text on black background
+replace-color.selectText.10=Choose text Color
+replace-color.selectText.11=Choose background Color
+replace-color.submit=Replace
+
+
 
 ###########################
 #                         #
diff --git a/src/main/resources/messages_ga_IE.properties b/src/main/resources/messages_ga_IE.properties
index 07d728165c9..2360538a952 100644
--- a/src/main/resources/messages_ga_IE.properties
+++ b/src/main/resources/messages_ga_IE.properties
@@ -76,6 +76,8 @@ donate=Síntiúis
 color=Dath
 sponsor=Urraitheoir
 info=Eolas
+page=Page
+pages=Pages
 
 legal.privacy=Privacy Policy
 legal.terms=Terms and Conditions
@@ -480,6 +482,26 @@ home.removeImagePdf.title=Remove image
 home.removeImagePdf.desc=Remove image from PDF to reduce file size
 removeImagePdf.tags=Remove Image,Page operations,Back end,server side
 
+#replace-invert-color
+replace-color.title=Replace-Invert-Color
+replace-color.header=Replace-Invert Color PDF
+home.replaceColorPdf.title=Replace and Invert Color
+home.replaceColorPdf.desc=Replace color for text and background in PDF and invert full color of pdf to reduce file size
+replaceColorPdf.tags=Replace Color,Page operations,Back end,server side
+replace-color.selectText.1=Replace or Invert color Options
+replace-color.selectText.2=Default(Default high contrast colors)
+replace-color.selectText.3=Custom(Customized colors)
+replace-color.selectText.4=Full-Invert(Invert all colors)
+replace-color.selectText.5=High contrast color options
+replace-color.selectText.6=white text on black background
+replace-color.selectText.7=Black text on white background
+replace-color.selectText.8=Yellow text on black background
+replace-color.selectText.9=Green text on black background
+replace-color.selectText.10=Choose text Color
+replace-color.selectText.11=Choose background Color
+replace-color.submit=Replace
+
+
 
 ###########################
 #                         #
diff --git a/src/main/resources/messages_hi_IN.properties b/src/main/resources/messages_hi_IN.properties
index 1cda3712826..d93dc2ddec1 100644
--- a/src/main/resources/messages_hi_IN.properties
+++ b/src/main/resources/messages_hi_IN.properties
@@ -76,6 +76,8 @@ donate=Donate
 color=Color
 sponsor=Sponsor
 info=Info
+page=पृष्ठ
+pages=पृष्ठों
 
 legal.privacy=Privacy Policy
 legal.terms=Terms and Conditions
@@ -480,6 +482,26 @@ home.removeImagePdf.title=Remove image
 home.removeImagePdf.desc=Remove image from PDF to reduce file size
 removeImagePdf.tags=Remove Image,Page operations,Back end,server side
 
+#replace-invert-color
+replace-color.title=Replace-Invert-Color
+replace-color.header=Replace-Invert Color PDF
+home.replaceColorPdf.title=Replace and Invert Color
+home.replaceColorPdf.desc=Replace color for text and background in PDF and invert full color of pdf to reduce file size
+replaceColorPdf.tags=Replace Color,Page operations,Back end,server side
+replace-color.selectText.1=Replace or Invert color Options
+replace-color.selectText.2=Default(Default high contrast colors)
+replace-color.selectText.3=Custom(Customized colors)
+replace-color.selectText.4=Full-Invert(Invert all colors)
+replace-color.selectText.5=High contrast color options
+replace-color.selectText.6=white text on black background
+replace-color.selectText.7=Black text on white background
+replace-color.selectText.8=Yellow text on black background
+replace-color.selectText.9=Green text on black background
+replace-color.selectText.10=Choose text Color
+replace-color.selectText.11=Choose background Color
+replace-color.submit=Replace
+
+
 
 ###########################
 #                         #
diff --git a/src/main/resources/messages_hr_HR.properties b/src/main/resources/messages_hr_HR.properties
index fd69ac86f58..e8f93b20015 100644
--- a/src/main/resources/messages_hr_HR.properties
+++ b/src/main/resources/messages_hr_HR.properties
@@ -76,6 +76,8 @@ donate=Doniraj
 color=Boja
 sponsor=Sponzor
 info=Info
+page=Page
+pages=Pages
 
 legal.privacy=Privacy Policy
 legal.terms=Terms and Conditions
@@ -480,6 +482,26 @@ home.removeImagePdf.title=Remove image
 home.removeImagePdf.desc=Remove image from PDF to reduce file size
 removeImagePdf.tags=Remove Image,Page operations,Back end,server side
 
+#replace-invert-color
+replace-color.title=Replace-Invert-Color
+replace-color.header=Replace-Invert Color PDF
+home.replaceColorPdf.title=Replace and Invert Color
+home.replaceColorPdf.desc=Replace color for text and background in PDF and invert full color of pdf to reduce file size
+replaceColorPdf.tags=Replace Color,Page operations,Back end,server side
+replace-color.selectText.1=Replace or Invert color Options
+replace-color.selectText.2=Default(Default high contrast colors)
+replace-color.selectText.3=Custom(Customized colors)
+replace-color.selectText.4=Full-Invert(Invert all colors)
+replace-color.selectText.5=High contrast color options
+replace-color.selectText.6=white text on black background
+replace-color.selectText.7=Black text on white background
+replace-color.selectText.8=Yellow text on black background
+replace-color.selectText.9=Green text on black background
+replace-color.selectText.10=Choose text Color
+replace-color.selectText.11=Choose background Color
+replace-color.submit=Replace
+
+
 
 ###########################
 #                         #
diff --git a/src/main/resources/messages_hu_HU.properties b/src/main/resources/messages_hu_HU.properties
index c2c53163d50..e22cee08c4d 100644
--- a/src/main/resources/messages_hu_HU.properties
+++ b/src/main/resources/messages_hu_HU.properties
@@ -76,6 +76,8 @@ donate=Donate
 color=Color
 sponsor=Sponsor
 info=Info
+page=Page
+pages=Pages
 
 legal.privacy=Privacy Policy
 legal.terms=Terms and Conditions
@@ -480,6 +482,26 @@ home.removeImagePdf.title=Remove image
 home.removeImagePdf.desc=Remove image from PDF to reduce file size
 removeImagePdf.tags=Remove Image,Page operations,Back end,server side
 
+#replace-invert-color
+replace-color.title=Replace-Invert-Color
+replace-color.header=Replace-Invert Color PDF
+home.replaceColorPdf.title=Replace and Invert Color
+home.replaceColorPdf.desc=Replace color for text and background in PDF and invert full color of pdf to reduce file size
+replaceColorPdf.tags=Replace Color,Page operations,Back end,server side
+replace-color.selectText.1=Replace or Invert color Options
+replace-color.selectText.2=Default(Default high contrast colors)
+replace-color.selectText.3=Custom(Customized colors)
+replace-color.selectText.4=Full-Invert(Invert all colors)
+replace-color.selectText.5=High contrast color options
+replace-color.selectText.6=white text on black background
+replace-color.selectText.7=Black text on white background
+replace-color.selectText.8=Yellow text on black background
+replace-color.selectText.9=Green text on black background
+replace-color.selectText.10=Choose text Color
+replace-color.selectText.11=Choose background Color
+replace-color.submit=Replace
+
+
 
 ###########################
 #                         #
diff --git a/src/main/resources/messages_id_ID.properties b/src/main/resources/messages_id_ID.properties
index fcf8e5e82d0..cbc0e61a196 100644
--- a/src/main/resources/messages_id_ID.properties
+++ b/src/main/resources/messages_id_ID.properties
@@ -76,6 +76,8 @@ donate=Donate
 color=Color
 sponsor=Sponsor
 info=Info
+page=Page
+pages=Pages
 
 legal.privacy=Privacy Policy
 legal.terms=Terms and Conditions
@@ -480,6 +482,26 @@ home.removeImagePdf.title=Remove image
 home.removeImagePdf.desc=Remove image from PDF to reduce file size
 removeImagePdf.tags=Remove Image,Page operations,Back end,server side
 
+#replace-invert-color
+replace-color.title=Replace-Invert-Color
+replace-color.header=Replace-Invert Color PDF
+home.replaceColorPdf.title=Replace and Invert Color
+home.replaceColorPdf.desc=Replace color for text and background in PDF and invert full color of pdf to reduce file size
+replaceColorPdf.tags=Replace Color,Page operations,Back end,server side
+replace-color.selectText.1=Replace or Invert color Options
+replace-color.selectText.2=Default(Default high contrast colors)
+replace-color.selectText.3=Custom(Customized colors)
+replace-color.selectText.4=Full-Invert(Invert all colors)
+replace-color.selectText.5=High contrast color options
+replace-color.selectText.6=white text on black background
+replace-color.selectText.7=Black text on white background
+replace-color.selectText.8=Yellow text on black background
+replace-color.selectText.9=Green text on black background
+replace-color.selectText.10=Choose text Color
+replace-color.selectText.11=Choose background Color
+replace-color.submit=Replace
+
+
 
 ###########################
 #                         #
diff --git a/src/main/resources/messages_it_IT.properties b/src/main/resources/messages_it_IT.properties
index 6355ea65d41..e8fb9fcca38 100644
--- a/src/main/resources/messages_it_IT.properties
+++ b/src/main/resources/messages_it_IT.properties
@@ -76,6 +76,8 @@ donate=Donazione
 color=Colore
 sponsor=Sponsor
 info=Info
+page=Page
+pages=Pages
 
 legal.privacy=Informativa sulla privacy
 legal.terms=Termini e Condizioni
@@ -480,6 +482,26 @@ home.removeImagePdf.title=Rimuovi immagine
 home.removeImagePdf.desc=Rimuovi le immagini dal PDF per ridurre la dimensione del file
 removeImagePdf.tags=Rimuovi immagine,operazioni sulla pagina,back-end,lato server
 
+#replace-invert-color
+replace-color.title=Sostituisci-Inverti-Colore
+replace-color.header=Sostituisci-Inverti colore PDF
+home.replaceColorPdf.title=Sostituisci e inverti il colore
+home.replaceColorPdf.desc=Sostituisci il colore del testo e dello sfondo nel PDF e inverti il ​​colore completo del PDF per ridurre le dimensioni del file
+replaceColorPdf.tags=Sostituisci colore, Operazioni di pagina, Back-end, lato server
+replace-color.selectText.1=Sostituisci o inverti le opzioni del colore
+replace-color.selectText.2=Predefinito (colori ad alto contrasto predefiniti)
+replace-color.selectText.3=Personalizzato (colori personalizzati)
+replace-color.selectText.4=Inversione completa (inverte tutti i colori)
+replace-color.selectText.5=Opzioni di colore ad alto contrasto
+replace-color.selectText.6=testo bianco su sfondo nero
+replace-color.selectText.7=Testo nero su sfondo bianco
+replace-color.selectText.8=Testo giallo su sfondo nero
+replace-color.selectText.9=Testo verde su sfondo nero
+replace-color.selectText.10=Scegli il colore del testo
+replace-color.selectText.11=Scegli il colore di sfondo
+replace-color.submit=Sostituisci
+
+
 
 ###########################
 #                         #
diff --git a/src/main/resources/messages_ja_JP.properties b/src/main/resources/messages_ja_JP.properties
index afb8ff548a7..e5286295d3c 100644
--- a/src/main/resources/messages_ja_JP.properties
+++ b/src/main/resources/messages_ja_JP.properties
@@ -76,6 +76,8 @@ donate=寄付する
 color=色
 sponsor=スポンサー
 info=Info
+page=Page
+pages=Pages
 
 legal.privacy=プライバシーポリシー
 legal.terms=利用規約
@@ -480,6 +482,26 @@ home.removeImagePdf.title=画像の削除
 home.removeImagePdf.desc=PDFから画像を削除してファイルサイズを小さくします
 removeImagePdf.tags=Remove Image,Page operations,Back end,server side
 
+#replace-invert-color
+replace-color.title=Replace-Invert-Color
+replace-color.header=Replace-Invert Color PDF
+home.replaceColorPdf.title=Replace and Invert Color
+home.replaceColorPdf.desc=Replace color for text and background in PDF and invert full color of pdf to reduce file size
+replaceColorPdf.tags=Replace Color,Page operations,Back end,server side
+replace-color.selectText.1=Replace or Invert color Options
+replace-color.selectText.2=Default(Default high contrast colors)
+replace-color.selectText.3=Custom(Customized colors)
+replace-color.selectText.4=Full-Invert(Invert all colors)
+replace-color.selectText.5=High contrast color options
+replace-color.selectText.6=white text on black background
+replace-color.selectText.7=Black text on white background
+replace-color.selectText.8=Yellow text on black background
+replace-color.selectText.9=Green text on black background
+replace-color.selectText.10=Choose text Color
+replace-color.selectText.11=Choose background Color
+replace-color.submit=Replace
+
+
 
 ###########################
 #                         #
diff --git a/src/main/resources/messages_ko_KR.properties b/src/main/resources/messages_ko_KR.properties
index 02d5c3da2f1..43d8f84ec00 100644
--- a/src/main/resources/messages_ko_KR.properties
+++ b/src/main/resources/messages_ko_KR.properties
@@ -76,6 +76,8 @@ donate=기부하기
 color=색상
 sponsor=스폰서
 info=Info
+page=Page
+pages=Pages
 
 legal.privacy=Privacy Policy
 legal.terms=Terms and Conditions
@@ -480,6 +482,26 @@ home.removeImagePdf.title=Remove image
 home.removeImagePdf.desc=Remove image from PDF to reduce file size
 removeImagePdf.tags=Remove Image,Page operations,Back end,server side
 
+#replace-invert-color
+replace-color.title=Replace-Invert-Color
+replace-color.header=Replace-Invert Color PDF
+home.replaceColorPdf.title=Replace and Invert Color
+home.replaceColorPdf.desc=Replace color for text and background in PDF and invert full color of pdf to reduce file size
+replaceColorPdf.tags=Replace Color,Page operations,Back end,server side
+replace-color.selectText.1=Replace or Invert color Options
+replace-color.selectText.2=Default(Default high contrast colors)
+replace-color.selectText.3=Custom(Customized colors)
+replace-color.selectText.4=Full-Invert(Invert all colors)
+replace-color.selectText.5=High contrast color options
+replace-color.selectText.6=white text on black background
+replace-color.selectText.7=Black text on white background
+replace-color.selectText.8=Yellow text on black background
+replace-color.selectText.9=Green text on black background
+replace-color.selectText.10=Choose text Color
+replace-color.selectText.11=Choose background Color
+replace-color.submit=Replace
+
+
 
 ###########################
 #                         #
diff --git a/src/main/resources/messages_nl_NL.properties b/src/main/resources/messages_nl_NL.properties
index 391c7e6962d..4d1469d8bc8 100644
--- a/src/main/resources/messages_nl_NL.properties
+++ b/src/main/resources/messages_nl_NL.properties
@@ -76,6 +76,8 @@ donate=Doneer
 color=Kleur
 sponsor=Sponsor
 info=Info
+page=Page
+pages=Pages
 
 legal.privacy=Privacy Policy
 legal.terms=Terms and Conditions
@@ -480,6 +482,26 @@ home.removeImagePdf.title=Remove image
 home.removeImagePdf.desc=Remove image from PDF to reduce file size
 removeImagePdf.tags=Remove Image,Page operations,Back end,server side
 
+#replace-invert-color
+replace-color.title=Replace-Invert-Color
+replace-color.header=Replace-Invert Color PDF
+home.replaceColorPdf.title=Replace and Invert Color
+home.replaceColorPdf.desc=Replace color for text and background in PDF and invert full color of pdf to reduce file size
+replaceColorPdf.tags=Replace Color,Page operations,Back end,server side
+replace-color.selectText.1=Replace or Invert color Options
+replace-color.selectText.2=Default(Default high contrast colors)
+replace-color.selectText.3=Custom(Customized colors)
+replace-color.selectText.4=Full-Invert(Invert all colors)
+replace-color.selectText.5=High contrast color options
+replace-color.selectText.6=white text on black background
+replace-color.selectText.7=Black text on white background
+replace-color.selectText.8=Yellow text on black background
+replace-color.selectText.9=Green text on black background
+replace-color.selectText.10=Choose text Color
+replace-color.selectText.11=Choose background Color
+replace-color.submit=Replace
+
+
 
 ###########################
 #                         #
diff --git a/src/main/resources/messages_no_NB.properties b/src/main/resources/messages_no_NB.properties
index 1592c3e13ed..abd0738a3a2 100644
--- a/src/main/resources/messages_no_NB.properties
+++ b/src/main/resources/messages_no_NB.properties
@@ -76,6 +76,8 @@ donate=Doner
 color=Farge
 sponsor=Sponsor
 info=Info
+page=Page
+pages=Pages
 
 legal.privacy=Privacy Policy
 legal.terms=Terms and Conditions
@@ -480,6 +482,26 @@ home.removeImagePdf.title=Remove image
 home.removeImagePdf.desc=Remove image from PDF to reduce file size
 removeImagePdf.tags=Remove Image,Page operations,Back end,server side
 
+#replace-invert-color
+replace-color.title=Replace-Invert-Color
+replace-color.header=Replace-Invert Color PDF
+home.replaceColorPdf.title=Replace and Invert Color
+home.replaceColorPdf.desc=Replace color for text and background in PDF and invert full color of pdf to reduce file size
+replaceColorPdf.tags=Replace Color,Page operations,Back end,server side
+replace-color.selectText.1=Replace or Invert color Options
+replace-color.selectText.2=Default(Default high contrast colors)
+replace-color.selectText.3=Custom(Customized colors)
+replace-color.selectText.4=Full-Invert(Invert all colors)
+replace-color.selectText.5=High contrast color options
+replace-color.selectText.6=white text on black background
+replace-color.selectText.7=Black text on white background
+replace-color.selectText.8=Yellow text on black background
+replace-color.selectText.9=Green text on black background
+replace-color.selectText.10=Choose text Color
+replace-color.selectText.11=Choose background Color
+replace-color.submit=Replace
+
+
 
 ###########################
 #                         #
diff --git a/src/main/resources/messages_pl_PL.properties b/src/main/resources/messages_pl_PL.properties
index 76a98ad3653..c15170cbdcd 100755
--- a/src/main/resources/messages_pl_PL.properties
+++ b/src/main/resources/messages_pl_PL.properties
@@ -76,6 +76,8 @@ donate=Podaruj
 color=kolor
 sponsor=sponsor
 info=informacje
+page=Page
+pages=Pages
 
 legal.privacy=Privacy Policy
 legal.terms=Terms and Conditions
@@ -480,6 +482,26 @@ home.removeImagePdf.title=Remove image
 home.removeImagePdf.desc=Remove image from PDF to reduce file size
 removeImagePdf.tags=Remove Image,Page operations,Back end,server side
 
+#replace-invert-color
+replace-color.title=Replace-Invert-Color
+replace-color.header=Replace-Invert Color PDF
+home.replaceColorPdf.title=Replace and Invert Color
+home.replaceColorPdf.desc=Replace color for text and background in PDF and invert full color of pdf to reduce file size
+replaceColorPdf.tags=Replace Color,Page operations,Back end,server side
+replace-color.selectText.1=Replace or Invert color Options
+replace-color.selectText.2=Default(Default high contrast colors)
+replace-color.selectText.3=Custom(Customized colors)
+replace-color.selectText.4=Full-Invert(Invert all colors)
+replace-color.selectText.5=High contrast color options
+replace-color.selectText.6=white text on black background
+replace-color.selectText.7=Black text on white background
+replace-color.selectText.8=Yellow text on black background
+replace-color.selectText.9=Green text on black background
+replace-color.selectText.10=Choose text Color
+replace-color.selectText.11=Choose background Color
+replace-color.submit=Replace
+
+
 
 ###########################
 #                         #
diff --git a/src/main/resources/messages_pt_BR.properties b/src/main/resources/messages_pt_BR.properties
index 61a6d7fa0a4..b1fc9dee210 100644
--- a/src/main/resources/messages_pt_BR.properties
+++ b/src/main/resources/messages_pt_BR.properties
@@ -76,6 +76,8 @@ donate=Doar
 color=Cor
 sponsor=Patrocine
 info=Informações
+page=Page
+pages=Pages
 
 legal.privacy=Política de Privacidade
 legal.terms=Termos e Condições
@@ -480,6 +482,26 @@ home.removeImagePdf.title=Remover imagem
 home.removeImagePdf.desc=Remova a imagem do PDF para reduzir o tamanho do arquivo
 removeImagePdf.tags=Remover imagem,operações de página,back-end,lado do servidor
 
+#replace-invert-color
+replace-color.title=Replace-Invert-Color
+replace-color.header=Replace-Invert Color PDF
+home.replaceColorPdf.title=Replace and Invert Color
+home.replaceColorPdf.desc=Replace color for text and background in PDF and invert full color of pdf to reduce file size
+replaceColorPdf.tags=Replace Color,Page operations,Back end,server side
+replace-color.selectText.1=Replace or Invert color Options
+replace-color.selectText.2=Default(Default high contrast colors)
+replace-color.selectText.3=Custom(Customized colors)
+replace-color.selectText.4=Full-Invert(Invert all colors)
+replace-color.selectText.5=High contrast color options
+replace-color.selectText.6=white text on black background
+replace-color.selectText.7=Black text on white background
+replace-color.selectText.8=Yellow text on black background
+replace-color.selectText.9=Green text on black background
+replace-color.selectText.10=Choose text Color
+replace-color.selectText.11=Choose background Color
+replace-color.submit=Replace
+
+
 
 ###########################
 #                         #
diff --git a/src/main/resources/messages_pt_PT.properties b/src/main/resources/messages_pt_PT.properties
index a5f9f48b269..7f6e2956828 100644
--- a/src/main/resources/messages_pt_PT.properties
+++ b/src/main/resources/messages_pt_PT.properties
@@ -76,6 +76,8 @@ donate=Donate
 color=Color
 sponsor=Sponsor
 info=Info
+page=Page
+pages=Pages
 
 legal.privacy=Privacy Policy
 legal.terms=Terms and Conditions
@@ -480,6 +482,26 @@ home.removeImagePdf.title=Remove image
 home.removeImagePdf.desc=Remove image from PDF to reduce file size
 removeImagePdf.tags=Remove Image,Page operations,Back end,server side
 
+#replace-invert-color
+replace-color.title=Replace-Invert-Color
+replace-color.header=Replace-Invert Color PDF
+home.replaceColorPdf.title=Replace and Invert Color
+home.replaceColorPdf.desc=Replace color for text and background in PDF and invert full color of pdf to reduce file size
+replaceColorPdf.tags=Replace Color,Page operations,Back end,server side
+replace-color.selectText.1=Replace or Invert color Options
+replace-color.selectText.2=Default(Default high contrast colors)
+replace-color.selectText.3=Custom(Customized colors)
+replace-color.selectText.4=Full-Invert(Invert all colors)
+replace-color.selectText.5=High contrast color options
+replace-color.selectText.6=white text on black background
+replace-color.selectText.7=Black text on white background
+replace-color.selectText.8=Yellow text on black background
+replace-color.selectText.9=Green text on black background
+replace-color.selectText.10=Choose text Color
+replace-color.selectText.11=Choose background Color
+replace-color.submit=Replace
+
+
 
 ###########################
 #                         #
diff --git a/src/main/resources/messages_ro_RO.properties b/src/main/resources/messages_ro_RO.properties
index e035ee7fa9f..f065256d678 100644
--- a/src/main/resources/messages_ro_RO.properties
+++ b/src/main/resources/messages_ro_RO.properties
@@ -76,6 +76,8 @@ donate=Donează
 color=Culoare
 sponsor=Sponsor
 info=Informații
+page=Page
+pages=Pages
 
 legal.privacy=Privacy Policy
 legal.terms=Terms and Conditions
@@ -480,6 +482,26 @@ home.removeImagePdf.title=Elimină imagine
 home.removeImagePdf.desc=Elimină imaginea din PDF pentru a reduce dimensiunea fișierului
 removeImagePdf.tags=Elimină Imagine,Operații pagină,Back end,server side
 
+#replace-invert-color
+replace-color.title=Replace-Invert-Color
+replace-color.header=Replace-Invert Color PDF
+home.replaceColorPdf.title=Replace and Invert Color
+home.replaceColorPdf.desc=Replace color for text and background in PDF and invert full color of pdf to reduce file size
+replaceColorPdf.tags=Replace Color,Page operations,Back end,server side
+replace-color.selectText.1=Replace or Invert color Options
+replace-color.selectText.2=Default(Default high contrast colors)
+replace-color.selectText.3=Custom(Customized colors)
+replace-color.selectText.4=Full-Invert(Invert all colors)
+replace-color.selectText.5=High contrast color options
+replace-color.selectText.6=white text on black background
+replace-color.selectText.7=Black text on white background
+replace-color.selectText.8=Yellow text on black background
+replace-color.selectText.9=Green text on black background
+replace-color.selectText.10=Choose text Color
+replace-color.selectText.11=Choose background Color
+replace-color.submit=Replace
+
+
 
 ###########################
 #                         #
diff --git a/src/main/resources/messages_ru_RU.properties b/src/main/resources/messages_ru_RU.properties
index a4001a498fe..b5db3c478c5 100644
--- a/src/main/resources/messages_ru_RU.properties
+++ b/src/main/resources/messages_ru_RU.properties
@@ -76,6 +76,8 @@ donate=Пожертвовать
 color=Цвет
 sponsor=Спонсор
 info=Info
+page=Page
+pages=Pages
 
 legal.privacy=Privacy Policy
 legal.terms=Terms and Conditions
@@ -480,6 +482,26 @@ home.removeImagePdf.title=Remove image
 home.removeImagePdf.desc=Remove image from PDF to reduce file size
 removeImagePdf.tags=Remove Image,Page operations,Back end,server side
 
+#replace-invert-color
+replace-color.title=Replace-Invert-Color
+replace-color.header=Replace-Invert Color PDF
+home.replaceColorPdf.title=Replace and Invert Color
+home.replaceColorPdf.desc=Replace color for text and background in PDF and invert full color of pdf to reduce file size
+replaceColorPdf.tags=Replace Color,Page operations,Back end,server side
+replace-color.selectText.1=Replace or Invert color Options
+replace-color.selectText.2=Default(Default high contrast colors)
+replace-color.selectText.3=Custom(Customized colors)
+replace-color.selectText.4=Full-Invert(Invert all colors)
+replace-color.selectText.5=High contrast color options
+replace-color.selectText.6=white text on black background
+replace-color.selectText.7=Black text on white background
+replace-color.selectText.8=Yellow text on black background
+replace-color.selectText.9=Green text on black background
+replace-color.selectText.10=Choose text Color
+replace-color.selectText.11=Choose background Color
+replace-color.submit=Replace
+
+
 
 ###########################
 #                         #
diff --git a/src/main/resources/messages_sk_SK.properties b/src/main/resources/messages_sk_SK.properties
index 1b9bb358eff..d64aaeaf8ae 100644
--- a/src/main/resources/messages_sk_SK.properties
+++ b/src/main/resources/messages_sk_SK.properties
@@ -76,6 +76,8 @@ donate=Darovať
 color=Farba
 sponsor=Sponzorovať
 info=Info
+page=Page
+pages=Pages
 
 legal.privacy=Privacy Policy
 legal.terms=Terms and Conditions
@@ -480,6 +482,26 @@ home.removeImagePdf.title=Remove image
 home.removeImagePdf.desc=Remove image from PDF to reduce file size
 removeImagePdf.tags=Remove Image,Page operations,Back end,server side
 
+#replace-invert-color
+replace-color.title=Replace-Invert-Color
+replace-color.header=Replace-Invert Color PDF
+home.replaceColorPdf.title=Replace and Invert Color
+home.replaceColorPdf.desc=Replace color for text and background in PDF and invert full color of pdf to reduce file size
+replaceColorPdf.tags=Replace Color,Page operations,Back end,server side
+replace-color.selectText.1=Replace or Invert color Options
+replace-color.selectText.2=Default(Default high contrast colors)
+replace-color.selectText.3=Custom(Customized colors)
+replace-color.selectText.4=Full-Invert(Invert all colors)
+replace-color.selectText.5=High contrast color options
+replace-color.selectText.6=white text on black background
+replace-color.selectText.7=Black text on white background
+replace-color.selectText.8=Yellow text on black background
+replace-color.selectText.9=Green text on black background
+replace-color.selectText.10=Choose text Color
+replace-color.selectText.11=Choose background Color
+replace-color.submit=Replace
+
+
 
 ###########################
 #                         #
diff --git a/src/main/resources/messages_sr_LATN_RS.properties b/src/main/resources/messages_sr_LATN_RS.properties
index 900edc0798c..53bb42300a4 100644
--- a/src/main/resources/messages_sr_LATN_RS.properties
+++ b/src/main/resources/messages_sr_LATN_RS.properties
@@ -76,6 +76,8 @@ donate=Donate
 color=Color
 sponsor=Sponsor
 info=Info
+page=Page
+pages=Pages
 
 legal.privacy=Privacy Policy
 legal.terms=Terms and Conditions
@@ -480,6 +482,26 @@ home.removeImagePdf.title=Remove image
 home.removeImagePdf.desc=Remove image from PDF to reduce file size
 removeImagePdf.tags=Remove Image,Page operations,Back end,server side
 
+#replace-invert-color
+replace-color.title=Replace-Invert-Color
+replace-color.header=Replace-Invert Color PDF
+home.replaceColorPdf.title=Replace and Invert Color
+home.replaceColorPdf.desc=Replace color for text and background in PDF and invert full color of pdf to reduce file size
+replaceColorPdf.tags=Replace Color,Page operations,Back end,server side
+replace-color.selectText.1=Replace or Invert color Options
+replace-color.selectText.2=Default(Default high contrast colors)
+replace-color.selectText.3=Custom(Customized colors)
+replace-color.selectText.4=Full-Invert(Invert all colors)
+replace-color.selectText.5=High contrast color options
+replace-color.selectText.6=white text on black background
+replace-color.selectText.7=Black text on white background
+replace-color.selectText.8=Yellow text on black background
+replace-color.selectText.9=Green text on black background
+replace-color.selectText.10=Choose text Color
+replace-color.selectText.11=Choose background Color
+replace-color.submit=Replace
+
+
 
 ###########################
 #                         #
diff --git a/src/main/resources/messages_sv_SE.properties b/src/main/resources/messages_sv_SE.properties
index d1316494274..a85d294ce91 100644
--- a/src/main/resources/messages_sv_SE.properties
+++ b/src/main/resources/messages_sv_SE.properties
@@ -76,6 +76,8 @@ donate=Donera
 color=Färg
 sponsor=Sponsor
 info=Info
+page=Page
+pages=Pages
 
 legal.privacy=Privacy Policy
 legal.terms=Terms and Conditions
@@ -480,6 +482,26 @@ home.removeImagePdf.title=Ta bort bild
 home.removeImagePdf.desc=Ta bort bild från PDF för att minska filstorlek
 removeImagePdf.tags=Ta bort bild,Sidoperationer,Backend,serversida
 
+#replace-invert-color
+replace-color.title=Replace-Invert-Color
+replace-color.header=Replace-Invert Color PDF
+home.replaceColorPdf.title=Replace and Invert Color
+home.replaceColorPdf.desc=Replace color for text and background in PDF and invert full color of pdf to reduce file size
+replaceColorPdf.tags=Replace Color,Page operations,Back end,server side
+replace-color.selectText.1=Replace or Invert color Options
+replace-color.selectText.2=Default(Default high contrast colors)
+replace-color.selectText.3=Custom(Customized colors)
+replace-color.selectText.4=Full-Invert(Invert all colors)
+replace-color.selectText.5=High contrast color options
+replace-color.selectText.6=white text on black background
+replace-color.selectText.7=Black text on white background
+replace-color.selectText.8=Yellow text on black background
+replace-color.selectText.9=Green text on black background
+replace-color.selectText.10=Choose text Color
+replace-color.selectText.11=Choose background Color
+replace-color.submit=Replace
+
+
 
 ###########################
 #                         #
diff --git a/src/main/resources/messages_th_TH.properties b/src/main/resources/messages_th_TH.properties
index bcccaad86f6..69f93721a52 100644
--- a/src/main/resources/messages_th_TH.properties
+++ b/src/main/resources/messages_th_TH.properties
@@ -76,6 +76,8 @@ donate=บริจาค
 color=สี
 sponsor=ผู้สนับสนุน
 info=ข้อมูล
+page=Page
+pages=Pages
 
 legal.privacy=Privacy Policy
 legal.terms=Terms and Conditions
@@ -480,6 +482,26 @@ home.removeImagePdf.title=Remove image
 home.removeImagePdf.desc=Remove image from PDF to reduce file size
 removeImagePdf.tags=Remove Image,Page operations,Back end,server side
 
+#replace-invert-color
+replace-color.title=Replace-Invert-Color
+replace-color.header=Replace-Invert Color PDF
+home.replaceColorPdf.title=Replace and Invert Color
+home.replaceColorPdf.desc=Replace color for text and background in PDF and invert full color of pdf to reduce file size
+replaceColorPdf.tags=Replace Color,Page operations,Back end,server side
+replace-color.selectText.1=Replace or Invert color Options
+replace-color.selectText.2=Default(Default high contrast colors)
+replace-color.selectText.3=Custom(Customized colors)
+replace-color.selectText.4=Full-Invert(Invert all colors)
+replace-color.selectText.5=High contrast color options
+replace-color.selectText.6=white text on black background
+replace-color.selectText.7=Black text on white background
+replace-color.selectText.8=Yellow text on black background
+replace-color.selectText.9=Green text on black background
+replace-color.selectText.10=Choose text Color
+replace-color.selectText.11=Choose background Color
+replace-color.submit=Replace
+
+
 
 ###########################
 #                         #
diff --git a/src/main/resources/messages_tr_TR.properties b/src/main/resources/messages_tr_TR.properties
index 718271479bd..ad3a5339a39 100644
--- a/src/main/resources/messages_tr_TR.properties
+++ b/src/main/resources/messages_tr_TR.properties
@@ -76,6 +76,8 @@ donate=Bağış Yapın
 color=Renk
 sponsor=Bağış
 info=Bilgi
+page=Page
+pages=Pages
 
 legal.privacy=Gizlilik Politikası
 legal.terms=Şartlar ve koşullar
@@ -480,6 +482,26 @@ home.removeImagePdf.title=Resmi kaldır
 home.removeImagePdf.desc=Dosya boyutunu küçültmek için PDF'den resmi kaldırın
 removeImagePdf.tags=Resmi Kaldır,Sayfa İşlemleri,Arka uç,sunucu tarafı
 
+#replace-invert-color
+replace-color.title=Replace-Invert-Color
+replace-color.header=Replace-Invert Color PDF
+home.replaceColorPdf.title=Replace and Invert Color
+home.replaceColorPdf.desc=Replace color for text and background in PDF and invert full color of pdf to reduce file size
+replaceColorPdf.tags=Replace Color,Page operations,Back end,server side
+replace-color.selectText.1=Replace or Invert color Options
+replace-color.selectText.2=Default(Default high contrast colors)
+replace-color.selectText.3=Custom(Customized colors)
+replace-color.selectText.4=Full-Invert(Invert all colors)
+replace-color.selectText.5=High contrast color options
+replace-color.selectText.6=white text on black background
+replace-color.selectText.7=Black text on white background
+replace-color.selectText.8=Yellow text on black background
+replace-color.selectText.9=Green text on black background
+replace-color.selectText.10=Choose text Color
+replace-color.selectText.11=Choose background Color
+replace-color.submit=Replace
+
+
 
 ###########################
 #                         #
diff --git a/src/main/resources/messages_uk_UA.properties b/src/main/resources/messages_uk_UA.properties
index 8a06a720fd5..ed35d4e6684 100644
--- a/src/main/resources/messages_uk_UA.properties
+++ b/src/main/resources/messages_uk_UA.properties
@@ -76,6 +76,8 @@ donate=Задонатити
 color=Колір
 sponsor=Спонсор
 info=Інформація
+page=Page
+pages=Pages
 
 legal.privacy=Privacy Policy
 legal.terms=Terms and Conditions
@@ -480,6 +482,26 @@ home.removeImagePdf.title=Remove image
 home.removeImagePdf.desc=Remove image from PDF to reduce file size
 removeImagePdf.tags=Remove Image,Page operations,Back end,server side
 
+#replace-invert-color
+replace-color.title=Replace-Invert-Color
+replace-color.header=Replace-Invert Color PDF
+home.replaceColorPdf.title=Replace and Invert Color
+home.replaceColorPdf.desc=Replace color for text and background in PDF and invert full color of pdf to reduce file size
+replaceColorPdf.tags=Replace Color,Page operations,Back end,server side
+replace-color.selectText.1=Replace or Invert color Options
+replace-color.selectText.2=Default(Default high contrast colors)
+replace-color.selectText.3=Custom(Customized colors)
+replace-color.selectText.4=Full-Invert(Invert all colors)
+replace-color.selectText.5=High contrast color options
+replace-color.selectText.6=white text on black background
+replace-color.selectText.7=Black text on white background
+replace-color.selectText.8=Yellow text on black background
+replace-color.selectText.9=Green text on black background
+replace-color.selectText.10=Choose text Color
+replace-color.selectText.11=Choose background Color
+replace-color.submit=Replace
+
+
 
 ###########################
 #                         #
diff --git a/src/main/resources/messages_vi_VN.properties b/src/main/resources/messages_vi_VN.properties
index 245129e98de..c12a40d530e 100644
--- a/src/main/resources/messages_vi_VN.properties
+++ b/src/main/resources/messages_vi_VN.properties
@@ -76,6 +76,8 @@ donate=Ủng hộ
 color=Màu sắc
 sponsor=Nhà tài trợ
 info=Thông tin
+page=Page
+pages=Pages
 
 legal.privacy=Privacy Policy
 legal.terms=Terms and Conditions
@@ -480,6 +482,26 @@ home.removeImagePdf.title=Remove image
 home.removeImagePdf.desc=Remove image from PDF to reduce file size
 removeImagePdf.tags=Remove Image,Page operations,Back end,server side
 
+#replace-invert-color
+replace-color.title=Replace-Invert-Color
+replace-color.header=Replace-Invert Color PDF
+home.replaceColorPdf.title=Replace and Invert Color
+home.replaceColorPdf.desc=Replace color for text and background in PDF and invert full color of pdf to reduce file size
+replaceColorPdf.tags=Replace Color,Page operations,Back end,server side
+replace-color.selectText.1=Replace or Invert color Options
+replace-color.selectText.2=Default(Default high contrast colors)
+replace-color.selectText.3=Custom(Customized colors)
+replace-color.selectText.4=Full-Invert(Invert all colors)
+replace-color.selectText.5=High contrast color options
+replace-color.selectText.6=white text on black background
+replace-color.selectText.7=Black text on white background
+replace-color.selectText.8=Yellow text on black background
+replace-color.selectText.9=Green text on black background
+replace-color.selectText.10=Choose text Color
+replace-color.selectText.11=Choose background Color
+replace-color.submit=Replace
+
+
 
 ###########################
 #                         #
diff --git a/src/main/resources/messages_zh_CN.properties b/src/main/resources/messages_zh_CN.properties
index 80e9e0cf5b9..4ddf1e87c94 100644
--- a/src/main/resources/messages_zh_CN.properties
+++ b/src/main/resources/messages_zh_CN.properties
@@ -47,7 +47,7 @@ green=绿色
 blue=蓝色
 custom=自定义...
 WorkInProgess=工作正在进行中，可能无法工作或有错误，请报告任何问题！
-poweredBy=Powered by
+poweredBy=服务来源：
 yes=是
 no=否
 changedCredsMessage=凭证已更改！
@@ -76,6 +76,8 @@ donate=捐款
 color=颜色
 sponsor=赞助
 info=信息
+page=Page
+pages=Pages
 
 legal.privacy=Privacy Policy
 legal.terms=Terms and Conditions
@@ -131,7 +133,7 @@ navbar.sections.edit=查看和编辑
 #  SETTINGS #
 #############
 settings.title=设置
-settings.update=可更新
+settings.update=有可用的更新
 settings.updateAvailable=当前版本为 {0}，新版本 ({1}) 可用。
 settings.appVersion=应用程序版本：
 settings.downloadOption.title=选择下载选项（单个文件非压缩文件）：
@@ -480,6 +482,26 @@ home.removeImagePdf.title=删除图像
 home.removeImagePdf.desc=删除图像减少PDF大小
 removeImagePdf.tags=删除图像, 页面操作, 后端, 服务端
 
+#replace-invert-color
+replace-color.title=Replace-Invert-Color
+replace-color.header=Replace-Invert Color PDF
+home.replaceColorPdf.title=Replace and Invert Color
+home.replaceColorPdf.desc=Replace color for text and background in PDF and invert full color of pdf to reduce file size
+replaceColorPdf.tags=Replace Color,Page operations,Back end,server side
+replace-color.selectText.1=Replace or Invert color Options
+replace-color.selectText.2=Default(Default high contrast colors)
+replace-color.selectText.3=Custom(Customized colors)
+replace-color.selectText.4=Full-Invert(Invert all colors)
+replace-color.selectText.5=High contrast color options
+replace-color.selectText.6=white text on black background
+replace-color.selectText.7=Black text on white background
+replace-color.selectText.8=Yellow text on black background
+replace-color.selectText.9=Green text on black background
+replace-color.selectText.10=Choose text Color
+replace-color.selectText.11=Choose background Color
+replace-color.submit=Replace
+
+
 
 ###########################
 #                         #
diff --git a/src/main/resources/messages_zh_TW.properties b/src/main/resources/messages_zh_TW.properties
index 221e46af413..9e912b554b3 100644
--- a/src/main/resources/messages_zh_TW.properties
+++ b/src/main/resources/messages_zh_TW.properties
@@ -76,6 +76,8 @@ donate=捐贈
 color=顏色
 sponsor=贊助
 info=Info
+page=Page
+pages=Pages
 
 legal.privacy=Privacy Policy
 legal.terms=Terms and Conditions
@@ -480,6 +482,26 @@ home.removeImagePdf.title=Remove image
 home.removeImagePdf.desc=Remove image from PDF to reduce file size
 removeImagePdf.tags=Remove Image,Page operations,Back end,server side
 
+#replace-invert-color
+replace-color.title=Replace-Invert-Color
+replace-color.header=Replace-Invert Color PDF
+home.replaceColorPdf.title=Replace and Invert Color
+home.replaceColorPdf.desc=Replace color for text and background in PDF and invert full color of pdf to reduce file size
+replaceColorPdf.tags=Replace Color,Page operations,Back end,server side
+replace-color.selectText.1=Replace or Invert color Options
+replace-color.selectText.2=Default(Default high contrast colors)
+replace-color.selectText.3=Custom(Customized colors)
+replace-color.selectText.4=Full-Invert(Invert all colors)
+replace-color.selectText.5=High contrast color options
+replace-color.selectText.6=white text on black background
+replace-color.selectText.7=Black text on white background
+replace-color.selectText.8=Yellow text on black background
+replace-color.selectText.9=Green text on black background
+replace-color.selectText.10=Choose text Color
+replace-color.selectText.11=Choose background Color
+replace-color.submit=Replace
+
+
 
 ###########################
 #                         #
diff --git a/src/main/resources/static/css/navbar.css b/src/main/resources/static/css/navbar.css
index 96255e0c8a3..7db824628c3 100644
--- a/src/main/resources/static/css/navbar.css
+++ b/src/main/resources/static/css/navbar.css
@@ -7,8 +7,8 @@
 }
 
 #navbarSearch.show {
-  max-height: 300px;
-  /* Adjust this to your desired max height */
+  height: auto;
+  /*dynamically changes height*/
 }
 
 #searchResults .dropdown-item {
@@ -268,6 +268,7 @@ span.icon-text::after {
 /* Dropdown min-width */
 .dropdown-mw-28 {
   min-width: 280px;
+  min-height: 50px;
 }
 
 .dropdown-mw-20 {
@@ -314,6 +315,7 @@ span.icon-text::after {
     display: block;
     margin-top: 0;
   }
+
   .icon-hide {
     display: none;
   }
diff --git a/src/main/resources/static/js/merge.js b/src/main/resources/static/js/merge.js
index 55575727701..41d1fe1ebef 100644
--- a/src/main/resources/static/js/merge.js
+++ b/src/main/resources/static/js/merge.js
@@ -11,7 +11,7 @@ document.getElementById("fileInput-input").addEventListener("change", function (
 /**
  * @param {FileList} files
  */
-function displayFiles(files) {
+async function displayFiles(files) {
   const list = document.getElementById("selectedFiles");
 
   while (list.firstChild) {
@@ -19,11 +19,16 @@ function displayFiles(files) {
   }
 
   for (let i = 0; i < files.length; i++) {
+    const pageCount = await getPDFPageCount(files[i]);
+    const pageLabel = pageCount === 1 ? pageTranslation : pagesTranslation;
     const item = document.createElement("li");
     item.className = "list-group-item";
     item.innerHTML = `
             <div class="d-flex justify-content-between align-items-center w-100">
                 <div class="filename">${files[i].name}</div>
+                <div class="page-info">
+                    <span class="page-count">${pageCount} ${pageLabel}</span>
+                </div>
                 <div class="arrows d-flex">
                     <button class="btn btn-secondary move-up"><span>&uarr;</span></button>
                     <button class="btn btn-secondary move-down"><span>&darr;</span></button>
@@ -37,6 +42,13 @@ function displayFiles(files) {
   attachMoveButtons();
 }
 
+async function getPDFPageCount(file) {
+  const blobUrl = URL.createObjectURL(file);
+  const pdf = await pdfjsLib.getDocument(blobUrl).promise;
+  URL.revokeObjectURL(blobUrl);
+  return pdf.numPages;
+}
+
 function attachMoveButtons() {
   var moveUpButtons = document.querySelectorAll(".move-up");
   for (var i = 0; i < moveUpButtons.length; i++) {
diff --git a/src/main/resources/templates/fragments/navbar.html b/src/main/resources/templates/fragments/navbar.html
index b852569d7d5..fe0c8842d30 100644
--- a/src/main/resources/templates/fragments/navbar.html
+++ b/src/main/resources/templates/fragments/navbar.html
@@ -198,6 +198,9 @@ <h6 class="menu-title" th:text="#{navbar.sections.edit}"></h6>
                         <div
                                 th:replace="~{fragments/navbarEntry :: navbarEntry ('remove-image-pdf','remove_selection', 'home.removeImagePdf.title', 'home.removeImagePdf.desc', 'removeImagePdf.tags', 'other')}">
                         </div>
+                        <div
+                                th:replace="~{fragments/navbarEntry :: navbarEntry ('replace-and-invert-color-pdf','format_color_fill', 'replace-color.title', 'home.replaceColorPdf.desc', 'replaceColorPdf.tags', 'other')}">
+                        </div>
                       </div>
                       <!-- Advance menu items -->
                       <div class="col-lg-2 col-sm-6 py px-xl-1 px-2">
diff --git a/src/main/resources/templates/home.html b/src/main/resources/templates/home.html
index f8f85440ce2..7f448f7a67f 100644
--- a/src/main/resources/templates/home.html
+++ b/src/main/resources/templates/home.html
@@ -248,11 +248,15 @@ <h5 class="card-title" th:text="#{settings.update}"></h5>
               <div
                 th:replace="~{fragments/card :: card(id='remove-image-pdf', cardTitle=#{home.removeImagePdf.title}, cardText=#{home.removeImagePdf.desc}, cardLink='remove-image-pdf', toolIcon='remove_selection', tags=#{removeImagePdf.tags}, toolGroup='other')}">
               </div>
+              <div
+                      th:replace="~{fragments/card :: card(id='replace-color-pdf', cardTitle=#{home.replaceColorPdf.title}, cardText=#{home.replaceColorPdf.desc}, cardLink='replace-and-invert-color-pdf', toolIcon='format_color_fill', tags=#{replaceColorPdf.tags}, toolGroup='other')}">
+              </div>
+
             </div>
           </div>
+            <div id="groupAdvanced" class="feature-group">
+                <div
 
-          <div id="groupAdvanced" class="feature-group">
-            <div
               th:replace="~{fragments/featureGroupHeader :: featureGroupHeader(groupTitle=#{navbar.sections.advance})}">
             </div>
             <div class="feature-group-container">
diff --git a/src/main/resources/templates/merge-pdfs.html b/src/main/resources/templates/merge-pdfs.html
index 8e1e0fbce25..8a874788c82 100644
--- a/src/main/resources/templates/merge-pdfs.html
+++ b/src/main/resources/templates/merge-pdfs.html
@@ -1,46 +1,63 @@
 <!DOCTYPE html>
-<html th:lang="${#locale.language}" th:dir="#{language.direction}" th:data-language="${#locale.toString()}" xmlns:th="https://www.thymeleaf.org">
-  <head>
+<html th:lang="${#locale.language}" th:dir="#{language.direction}" th:data-language="${#locale.toString()}"
+  xmlns:th="https://www.thymeleaf.org">
+
+<head>
   <th:block th:insert="~{fragments/common :: head(title=#{merge.title}, header=#{merge.header})}"></th:block>
-    <link rel="stylesheet" th:href="@{'/css/merge.css'}">
-  </head>
+  <link rel="stylesheet" th:href="@{'/css/merge.css'}">
+</head>
 
-  <body>
-    <div id="page-container">
-      <div id="content-wrap">
-        <th:block th:insert="~{fragments/navbar.html :: navbar}"></th:block>
-        <br><br>
-        <div class="container" id="dropContainer">
-          <div class="row justify-content-center">
-            <div class="col-md-6 bg-card">
-              <div class="tool-header">
-                <span class="material-symbols-rounded tool-header-icon organize">add_to_photos</span>
-                <span class="tool-header-text" th:text="#{merge.header}"></span>
-              </div>
-              <form action="api/v1/general/merge-pdfs" method="post" enctype="multipart/form-data">
-                <div class="mb-3">
-                  <label th:text="#{multiPdfDropPrompt}" for="fileInput-input"></label>
-                  <div th:replace="~{fragments/common :: fileSelector(name='fileInput', multipleInputsForSingleRequest=true, accept='application/pdf')}"></div>
-                </div>
-                <div class="mb-3">
-                  <input type="checkbox" name="removeCertSign" id="removeCertSign">
-                  <label for="removeCertSign" th:text="#{merge.removeCertSign}">Remove digital signature in the merged file?</label>
-                </div>
-                <div class="mb-3">
-                  <ul id="selectedFiles" class="list-group"></ul>
-                </div>
-                <div class="mb-3">
-                  <button type="button" id="sortByNameBtn" class="btn btn-info" th:text="#{merge.sortByName}"></button>
-                  <button type="button" id="sortByDateBtn" class="btn btn-info" th:text="#{merge.sortByDate}"></button>
-                  <button type="submit" id="submitBtn" class="btn btn-primary" th:text="#{merge.submit}"></button>
-                </div>
-              </form>
-              <script th:src="@{'/js/merge.js'}"></script>
+<body>
+  <div id="page-container">
+    <div id="content-wrap">
+      <th:block th:insert="~{fragments/navbar.html :: navbar}"></th:block>
+      <br><br>
+      <div class="container" id="dropContainer">
+        <div class="row justify-content-center">
+          <div class="col-md-6 bg-card">
+            <div class="tool-header">
+              <span class="material-symbols-rounded tool-header-icon organize">add_to_photos</span>
+              <span class="tool-header-text" th:text="#{merge.header}"></span>
             </div>
+            <form action="api/v1/general/merge-pdfs" method="post" enctype="multipart/form-data">
+              <div class="mb-3">
+                <label th:text="#{multiPdfDropPrompt}" for="fileInput-input"></label>
+                <div
+                  th:replace="~{fragments/common :: fileSelector(name='fileInput', multipleInputsForSingleRequest=true, accept='application/pdf')}">
+                </div>
+              </div>
+              <div class="mb-3">
+                <input type="checkbox" name="removeCertSign" id="removeCertSign">
+                <label for="removeCertSign" th:text="#{merge.removeCertSign}">Remove digital signature in the merged
+                  file?</label>
+              </div>
+              <div class="mb-3">
+                <ul id="selectedFiles" class="list-group"></ul>
+              </div>
+              <div class="mb-3">
+                <button type="button" id="sortByNameBtn" class="btn btn-info" th:text="#{merge.sortByName}"></button>
+                <button type="button" id="sortByDateBtn" class="btn btn-info" th:text="#{merge.sortByDate}"></button>
+                <button type="submit" id="submitBtn" class="btn btn-primary" th:text="#{merge.submit}"></button>
+              </div>
+            </form>
+            <span id="pageTranslation" th:text="#{page}" style="display:none;"></span>
+            <span id="pagesTranslation" th:text="#{pages}" style="display:none;"></span>
+
+            <script type="text/javascript">
+              const pageTranslation = document.getElementById('pageTranslation').innerText; // Get translation for a single page
+              const pagesTranslation = document.getElementById('pagesTranslation').innerText; // Get translation for multiple pages
+            </script>
+            <script type="module">
+              import * as pdfjsLib from '/pdfjs-legacy/pdf.mjs';
+              pdfjsLib.GlobalWorkerOptions.workerSrc = '/pdfjs-legacy/pdf.worker.mjs';
+            </script>
+            <script th:src="@{'/js/merge.js'}"></script>
           </div>
         </div>
       </div>
-      <th:block th:insert="~{fragments/footer.html :: footer}"></th:block>
     </div>
-  </body>
-</html>
+    <th:block th:insert="~{fragments/footer.html :: footer}"></th:block>
+  </div>
+</body>
+
+</html>
\ No newline at end of file
diff --git a/src/main/resources/templates/misc/replace-color.html b/src/main/resources/templates/misc/replace-color.html
new file mode 100644
index 00000000000..4defcff7258
--- /dev/null
+++ b/src/main/resources/templates/misc/replace-color.html
@@ -0,0 +1,89 @@
+<!DOCTYPE html>
+<html th:lang="${#locale.language}" th:dir="#{language.direction}" th:data-language="${#locale.toString()}"
+      xmlns:th="https://www.thymeleaf.org">
+
+<head>
+    <th:block th:insert="~{fragments/common :: head(title=#{replace-color.title}, header=#{replace-color.header})}"></th:block>
+</head>
+
+<body>
+<th:block th:insert="~{fragments/common :: game}"></th:block>
+<div id="page-container">
+    <div id="content-wrap">
+        <th:block th:insert="~{fragments/navbar.html :: navbar}"></th:block>
+        <br><br>
+        <div class="container">
+            <div class="row justify-content-center">
+                <div class="col-md-6 bg-card">
+                    <div class="tool-header">
+                        <span class="material-symbols-rounded tool-header-icon advance">zoom_in_map</span>
+                        <span class="tool-header-text" th:text="#{replace-color.header}"></span>
+                    </div>
+                    <form action="#" th:action="@{'/api/v1/misc/replace-invert-pdf'}" method="post" enctype="multipart/form-data">
+                        <div
+                                th:replace="~{fragments/common :: fileSelector(name='fileInput', multipleInputsForSingleRequest=false, accept='application/pdf')}">
+                        </div>
+                        <div class="card mb-3">
+                            <div class="card-body">
+                                <h4 th:text="#{replace-color.selectText.1}"></h4>
+                                <select name="replaceAndInvertOption" id="replace-invert" class="form-control">
+                                    <option value="HIGH_CONTRAST_COLOR" th:text="#{replace-color.selectText.2}" ></option>
+                                    <option value="CUSTOM_COLOR" th:text="#{replace-color.selectText.3}"></option>
+                                    <option value="FULL_INVERSION" th:text="#{replace-color.selectText.4}" selected></option>
+                                </select>
+                            </div>
+                        </div>
+                        <div class="card mb-3" id="high-contrast-options" style="display: none">
+                            <div class="card-body">
+                                <h4 th:text="#{replace-color.selectText.5}"></h4>
+                                <select name="highContrastColorCombination" id="high-contrast" class="form-control">
+                                    <option value="WHITE_TEXT_ON_BLACK" th:text="#{replace-color.selectText.6}" selected></option>
+                                    <option value="BLACK_TEXT_ON_WHITE" th:text="#{replace-color.selectText.7}"></option>
+                                    <option value="YELLOW_TEXT_ON_BLACK" th:text="#{replace-color.selectText.8}"></option>
+                                    <option value="GREEN_TEXT_ON_BLACK" th:text="#{replace-color.selectText.9}"></option>
+                                </select>
+                            </div>
+                        </div>
+                        <div class="card mb-3" id = "custom-color-1" style="display: none">
+                            <div class="card-body">
+                                <h4 th:text="#{replace-color.selectText.10}"></h4>
+                                <input type="color" name="textColor" id="text-color" class="form-control">
+                            </div>
+                        </div>
+                        <div class="card mb-3" id = "custom-color-2" style="display: none">
+                            <div class="card-body">
+                                <h4 th:text="#{replace-color.selectText.11}"></h4>
+                                <input type="color" name="backGroundColor" id="bg-color" class="form-control">
+                            </div>
+                        </div>
+
+                        <button type="submit" id="submitBtn" class="btn btn-primary" th:text="#{replace-color.submit}"></button>
+                    </form>
+                </div>
+            </div>
+        </div>
+    </div>
+    <th:block th:insert="~{fragments/footer.html :: footer}"></th:block>
+</div>
+<script>
+    $(document).ready(function(){
+        $('#replace-invert').change(function() {
+            var selectedOption = $(this).val();
+
+            // Hide all conditional fields by default
+            $('#high-contrast-options').hide();
+            $('#custom-color-1').hide();
+            $('#custom-color-2').hide();
+
+            if (selectedOption === "HIGH_CONTRAST_COLOR") {
+                $('#high-contrast-options').show();
+            } else if (selectedOption === "CUSTOM_COLOR") {
+                $('#custom-color-1').show();
+                $('#custom-color-2').show();
+            }
+        });
+    });
+</script>
+</body>
+
+</html>
\ No newline at end of file