diff --git a/marker/processors/debug.py b/marker/processors/debug.py
index 3d46b046..1c6d5df8 100644
--- a/marker/processors/debug.py
+++ b/marker/processors/debug.py
@@ -49,7 +49,8 @@ class DebugProcessor(BaseProcessor):
 
     def __call__(self, document: Document):
         # Remove extension from doc name
-        doc_base = os.path.basename(document.filepath).rsplit(".", 1)[0]
+        filepath = document.filepath if isinstance(document.filepath, str) else ""
+        doc_base = os.path.basename(filepath).rsplit(".", 1)[0]
         self.debug_folder = os.path.join(self.debug_data_folder, doc_base)
         if any([self.debug_layout_images, self.debug_pdf_images, self.debug_json]):
             os.makedirs(self.debug_folder, exist_ok=True)
diff --git a/marker/providers/__init__.py b/marker/providers/__init__.py
index 6b389065..3d51f8d0 100644
--- a/marker/providers/__init__.py
+++ b/marker/providers/__init__.py
@@ -19,7 +19,7 @@ def raw_text(self):
 ProviderPageLines = Dict[int, List[ProviderOutput]]
 
 class BaseProvider:
-    def __init__(self, filepath: str, config: Optional[BaseModel | dict] = None):
+    def __init__(self, filepath: str | bytes, config: Optional[BaseModel | dict] = None):
         assign_config(self, config)
         self.filepath = filepath
 
diff --git a/marker/providers/pdf.py b/marker/providers/pdf.py
index 64a8d9a6..be38bfa5 100644
--- a/marker/providers/pdf.py
+++ b/marker/providers/pdf.py
@@ -26,8 +26,8 @@ class PdfProvider(BaseProvider):
     ocr_newline_threshold: float = .6
     ocr_alphanum_threshold: float = .3
 
-    def __init__(self, filepath: str, config=None):
-        super().__init__(filepath, config)
+    def __init__(self, file: str | bytes, config=None):
+        super().__init__(file, config)
 
         self.doc: pdfium.PdfDocument = pdfium.PdfDocument(self.filepath)
         self.page_lines: ProviderPageLines = {i: [] for i in range(len(self.doc))}
diff --git a/marker/schema/document.py b/marker/schema/document.py
index d7ca4c73..67dad682 100644
--- a/marker/schema/document.py
+++ b/marker/schema/document.py
@@ -23,7 +23,7 @@ class TocItem(BaseModel):
 
 
 class Document(BaseModel):
-    filepath: str
+    filepath: str | bytes
     pages: List[PageGroup]
     block_type: BlockTypes = BlockTypes.Document
     table_of_contents: List[TocItem] | None = None