diff --git a/ClickableWidgets.go b/ClickableWidgets.go
index 55124b37..e2bf6923 100644
--- a/ClickableWidgets.go
+++ b/ClickableWidgets.go
@@ -336,11 +336,11 @@ func (b *ImageButtonWithRgbaWidget) FramePadding(padding int) *ImageButtonWithRg
 
 // Build implements Widget interface.
 func (b *ImageButtonWithRgbaWidget) Build() {
-	if state := GetState[imageState](Context, b.id.String()); state == nil {
-		SetState(Context, b.id.String(), &imageState{})
+	if state := GetState[imageState](Context, b.id); state == nil {
+		SetState(Context, b.id, &imageState{})
 
 		NewTextureFromRgba(b.rgba, func(tex *Texture) {
-			SetState(Context, b.id.String(), &imageState{texture: tex})
+			SetState(Context, b.id, &imageState{texture: tex})
 		})
 	} else {
 		b.ImageButtonWidget.texture = state.texture
diff --git a/CodeEditor.go b/CodeEditor.go
index 0abcae4b..33b12ade 100644
--- a/CodeEditor.go
+++ b/CodeEditor.go
@@ -216,12 +216,12 @@ func (ce *CodeEditorWidget) Build() {
 }
 
 func (ce *CodeEditorWidget) getState() (state *codeEditorState) {
-	if state = GetState[codeEditorState](Context, ce.title.String()); state == nil {
+	if state = GetState[codeEditorState](Context, ce.title); state == nil {
 		state = &codeEditorState{
 			// editor: imgui.NewTextEditor(),
 		}
 
-		SetState(Context, ce.title.String(), state)
+		SetState(Context, ce.title, state)
 	}
 
 	return state
diff --git a/Context.go b/Context.go
index 17d280f6..8baabd23 100644
--- a/Context.go
+++ b/Context.go
@@ -142,17 +142,17 @@ func (c *GIUContext) Backend() backend.Backend[glfwbackend.GLFWWindowFlags] {
 }
 
 // SetState is a generic version of Context.SetState.
-func SetState[T any, PT genericDisposable[T]](c *GIUContext, id string, data PT) {
+func SetState[T any, PT genericDisposable[T]](c *GIUContext, id ID, data PT) {
 	c.state.Store(id, &state{valid: true, data: data})
 }
 
 // SetState stores data in context by id.
-func (c *GIUContext) SetState(id string, data Disposable) {
+func (c *GIUContext) SetState(id ID, data Disposable) {
 	c.state.Store(id, &state{valid: true, data: data})
 }
 
 // GetState is a generic version of Context.GetState.
-func GetState[T any, PT genericDisposable[T]](c *GIUContext, id string) PT {
+func GetState[T any, PT genericDisposable[T]](c *GIUContext, id ID) PT {
 	if s, ok := c.load(id); ok {
 		c.m.Lock()
 		s.valid = true
@@ -168,7 +168,7 @@ func GetState[T any, PT genericDisposable[T]](c *GIUContext, id string) PT {
 }
 
 // GetState returns previously stored state by id.
-func (c *GIUContext) GetState(id string) any {
+func (c *GIUContext) GetState(id ID) any {
 	if s, ok := c.load(id); ok {
 		c.m.Lock()
 		s.valid = true
diff --git a/Context_test.go b/Context_test.go
index 38a692d3..1e12ca9d 100644
--- a/Context_test.go
+++ b/Context_test.go
@@ -20,7 +20,7 @@ func (t *teststate2) Dispose() {
 
 func Test_SetGetState(t *testing.T) {
 	tests := []struct {
-		id   string
+		id   ID
 		data *teststate
 	}{
 		{"nil", nil},
@@ -28,7 +28,7 @@ func Test_SetGetState(t *testing.T) {
 	}
 
 	for _, tc := range tests {
-		t.Run(tc.id, func(t *testing.T) {
+		t.Run(tc.id.String(), func(t *testing.T) {
 			ctx := CreateContext(nil)
 			SetState(ctx, tc.id, tc.data)
 			restored := GetState[teststate](ctx, tc.id)
@@ -39,7 +39,7 @@ func Test_SetGetState(t *testing.T) {
 
 func Test_SetGetStateGeneric(t *testing.T) {
 	tests := []struct {
-		id   string
+		id   ID
 		data *teststate
 	}{
 		{"nil", nil},
@@ -47,7 +47,7 @@ func Test_SetGetStateGeneric(t *testing.T) {
 	}
 
 	for _, tc := range tests {
-		t.Run(tc.id, func(t *testing.T) {
+		t.Run(tc.id.String(), func(t *testing.T) {
 			ctx := CreateContext(nil)
 			SetState(ctx, tc.id, tc.data)
 			restored := GetState[teststate](ctx, tc.id)
@@ -57,7 +57,7 @@ func Test_SetGetStateGeneric(t *testing.T) {
 }
 
 func Test_SetGetWrongStateGeneric(t *testing.T) {
-	id := "id"
+	id := ID("id")
 	data := &teststate{}
 	ctx := GIUContext{}
 
@@ -66,6 +66,7 @@ func Test_SetGetWrongStateGeneric(t *testing.T) {
 			t.Errorf("expected code to assert to panic, but it didn't")
 		}
 	}()
+
 	SetState(&ctx, id, data)
 	GetState[teststate2](&ctx, id)
 }
@@ -73,9 +74,9 @@ func Test_SetGetWrongStateGeneric(t *testing.T) {
 func Test_invalidState(t *testing.T) {
 	ctx := CreateContext(nil)
 
-	state1ID := "state1"
-	state2ID := "state2"
-	states := map[string]*teststate{
+	state1ID := ID("state1")
+	state2ID := ID("state2")
+	states := map[ID]*teststate{
 		state1ID: {},
 		state2ID: {},
 	}
diff --git a/EventHandler.go b/EventHandler.go
index 417eed56..5327f99a 100644
--- a/EventHandler.go
+++ b/EventHandler.go
@@ -124,9 +124,9 @@ func (eh *EventHandler) Build() {
 		var state *eventHandlerState
 
 		stateID := GenAutoID("eventHandlerState")
-		if state = GetState[eventHandlerState](Context, stateID.String()); state == nil {
+		if state = GetState[eventHandlerState](Context, stateID); state == nil {
 			state = &eventHandlerState{}
-			SetState(Context, stateID.String(), state)
+			SetState(Context, stateID, state)
 		}
 
 		if eh.onActivate != nil && isActive && !state.isActive {
diff --git a/ExtraWidgets.go b/ExtraWidgets.go
index 7464262b..e6f7134c 100644
--- a/ExtraWidgets.go
+++ b/ExtraWidgets.go
@@ -314,9 +314,9 @@ func (l *ListBoxWidget) Build() {
 	selectedIndex := l.selectedIndex
 	if selectedIndex == nil {
 		var state *listBoxState
-		if state = GetState[listBoxState](Context, l.id.String()); state == nil {
+		if state = GetState[listBoxState](Context, l.id); state == nil {
 			state = &listBoxState{selectedIndex: 0}
-			SetState(Context, l.id.String(), state)
+			SetState(Context, l.id, state)
 		}
 
 		selectedIndex = &state.selectedIndex
diff --git a/ImageWidgets.go b/ImageWidgets.go
index 33262c64..4d6bd67c 100644
--- a/ImageWidgets.go
+++ b/ImageWidgets.go
@@ -177,9 +177,9 @@ func (i *ImageWithRgbaWidget) OnClick(cb func()) *ImageWithRgbaWidget {
 func (i *ImageWithRgbaWidget) Build() {
 	if i.rgba != nil {
 		var imgState *imageState
-		if imgState = GetState[imageState](Context, i.id.String()); imgState == nil || !reflect.DeepEqual(i.rgba, imgState.img) {
+		if imgState = GetState[imageState](Context, i.id); imgState == nil || !reflect.DeepEqual(i.rgba, imgState.img) {
 			imgState = &imageState{}
-			SetState(Context, i.id.String(), imgState)
+			SetState(Context, i.id, imgState)
 
 			NewTextureFromRgba(i.rgba, func(tex *Texture) {
 				imgState.texture = tex
@@ -200,7 +200,7 @@ var _ Widget = &ImageWithFileWidget{}
 // because files are not included in executable binaries!
 // You may want to use "embed" package and ImageWithRgba instead.
 type ImageWithFileWidget struct {
-	id      string
+	id      ID
 	imgPath string
 	img     *ImageWidget
 }
@@ -210,14 +210,14 @@ type ImageWithFileWidget struct {
 // to set a specific size, use .Size(width, height).
 func ImageWithFile(imgPath string) *ImageWithFileWidget {
 	return &ImageWithFileWidget{
-		id:      fmt.Sprintf("ImageWithFile_%s", imgPath),
+		id:      ID(fmt.Sprintf("ImageWithFile_%s", imgPath)),
 		imgPath: imgPath,
 		img:     Image(nil),
 	}
 }
 
 // ID sets the interval id of ImageWithFile widgets.
-func (i *ImageWithFileWidget) ID(id string) *ImageWithFileWidget {
+func (i *ImageWithFileWidget) ID(id ID) *ImageWithFileWidget {
 	i.id = id
 	return i
 }
@@ -259,7 +259,7 @@ var _ Widget = &ImageWithURLWidget{}
 // ImageWithURLWidget allows to display an image using
 // an URL as image source.
 type ImageWithURLWidget struct {
-	id              string
+	id              ID
 	imgURL          string
 	downloadTimeout time.Duration
 	whenLoading     Layout
@@ -274,7 +274,7 @@ type ImageWithURLWidget struct {
 // to set a specific size, use .Size(width, height).
 func ImageWithURL(url string) *ImageWithURLWidget {
 	return &ImageWithURLWidget{
-		id:              fmt.Sprintf("ImageWithURL_%s", url),
+		id:              ID(fmt.Sprintf("ImageWithURL_%s", url)),
 		imgURL:          url,
 		downloadTimeout: 10 * time.Second,
 		whenLoading:     Layout{Dummy(100, 100)},
diff --git a/Msgbox.go b/Msgbox.go
index 7585da1f..c6abdd37 100644
--- a/Msgbox.go
+++ b/Msgbox.go
@@ -97,7 +97,7 @@ func buildMsgboxButtons(buttons MsgboxButtons, callback DialogResultCallback) La
 	}
 }
 
-const msgboxID string = "###Msgbox"
+const msgboxID ID = "###Msgbox"
 
 // PrepareMsgbox should be invoked in function in the same layout level where you call g.Msgbox.
 // BUG: calling this more than 1 time per frame causes unexpected
@@ -122,7 +122,7 @@ func PrepareMsgbox() Layout {
 
 			state.m.Lock()
 			if state.open {
-				OpenPopup(msgboxID)
+				OpenPopup(msgboxID.String())
 				state.open = false
 			}
 
diff --git a/ProgressIndicator.go b/ProgressIndicator.go
index 75aea552..6669a2b5 100644
--- a/ProgressIndicator.go
+++ b/ProgressIndicator.go
@@ -55,7 +55,7 @@ var _ Widget = &ProgressIndicatorWidget{}
 // ProgressIndicatorWidget represents progress indicator widget
 // see examples/extrawidgets/.
 type ProgressIndicatorWidget struct {
-	internalID string
+	internalID ID
 	width      float32
 	height     float32
 	radius     float32
@@ -65,7 +65,7 @@ type ProgressIndicatorWidget struct {
 // ProgressIndicator creates a new ProgressIndicatorWidget.
 func ProgressIndicator(label string, width, height, radius float32) *ProgressIndicatorWidget {
 	return &ProgressIndicatorWidget{
-		internalID: "###giu-progress-indicator",
+		internalID: GenAutoID("###giu-progress-indicator"),
 		width:      width,
 		height:     height,
 		radius:     radius,
diff --git a/SplitLayout.go b/SplitLayout.go
index 290fa4fc..5bb4a68d 100644
--- a/SplitLayout.go
+++ b/SplitLayout.go
@@ -160,9 +160,9 @@ func (s *SplitLayoutWidget) buildChild(width, height float32, layout Widget) Wid
 }
 
 func (s *SplitLayoutWidget) getState() (state *splitLayoutState) {
-	if state = GetState[splitLayoutState](Context, s.id.String()); state == nil {
+	if state = GetState[splitLayoutState](Context, s.id); state == nil {
 		state = &splitLayoutState{delta: 0.0}
-		SetState(Context, s.id.String(), state)
+		SetState(Context, s.id, state)
 	}
 
 	return state
diff --git a/TextWidgets.go b/TextWidgets.go
index 57cc2c19..99571a20 100644
--- a/TextWidgets.go
+++ b/TextWidgets.go
@@ -244,9 +244,9 @@ func (i *InputTextWidget) OnChange(onChange func()) *InputTextWidget {
 func (i *InputTextWidget) Build() {
 	// Get state
 	var state *inputTextState
-	if state = GetState[inputTextState](Context, i.label.String()); state == nil {
+	if state = GetState[inputTextState](Context, i.label); state == nil {
 		state = &inputTextState{}
-		SetState(Context, i.label.String(), state)
+		SetState(Context, i.label, state)
 	}
 
 	if i.width != 0 {
diff --git a/Window.go b/Window.go
index 861dc119..6430a08c 100644
--- a/Window.go
+++ b/Window.go
@@ -191,8 +191,8 @@ func (w *WindowWidget) RegisterKeyboardShortcuts(s ...WindowShortcut) *WindowWid
 	return w
 }
 
-func (w *WindowWidget) getStateID() string {
-	return fmt.Sprintf("%s_windowState", w.title)
+func (w *WindowWidget) getStateID() ID {
+	return ID(fmt.Sprintf("%s_windowState", w.title))
 }
 
 // returns window state.