diff --git a/fpdfsdk/fpdf_annot.cpp b/fpdfsdk/fpdf_annot.cpp
index 7a2a164..3bca040 100644
--- a/fpdfsdk/fpdf_annot.cpp
+++ b/fpdfsdk/fpdf_annot.cpp
@@ -949,3 +949,31 @@
   *value = pWidget->GetFontSize();
   return true;
 }
+
+FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDFAnnot_IsChecked(FPDF_FORMHANDLE hHandle,
+                                                        FPDF_ANNOTATION annot) {
+  CPDFSDK_InteractiveForm* pForm = FormHandleToInteractiveForm(hHandle);
+  if (!pForm)
+    return false;
+
+  CPDF_Dictionary* pAnnotDict = GetAnnotDictFromFPDFAnnotation(annot);
+  if (!pAnnotDict)
+    return false;
+
+  CPDF_InteractiveForm* pPDFForm = pForm->GetInteractiveForm();
+  CPDF_FormField* pFormField = pPDFForm->GetFieldByDict(pAnnotDict);
+  if (!pFormField)
+    return false;
+
+  if (pFormField->GetType() != CPDF_FormField::kCheckBox &&
+      pFormField->GetType() != CPDF_FormField::kRadioButton) {
+    return false;
+  }
+
+  CPDF_FormControl* pFormControl = pPDFForm->GetControlByDict(pAnnotDict);
+  if (!pFormControl)
+    return false;
+
+  CPDFSDK_Widget* pWidget = pForm->GetWidget(pFormControl);
+  return pWidget && pWidget->IsChecked();
+}
diff --git a/fpdfsdk/fpdf_annot_embeddertest.cpp b/fpdfsdk/fpdf_annot_embeddertest.cpp
index ca71f24..aaf3657 100644
--- a/fpdfsdk/fpdf_annot_embeddertest.cpp
+++ b/fpdfsdk/fpdf_annot_embeddertest.cpp
@@ -2042,3 +2042,112 @@
 
   UnloadPage(page);
 }
+
+TEST_F(FPDFAnnotEmbedderTest, IsCheckedCheckbox) {
+  // Open a file with checkbox and radiobuttons widget annotations and load its
+  // first page.
+  ASSERT_TRUE(OpenDocument("click_form.pdf"));
+  FPDF_PAGE page = LoadPage(0);
+  ASSERT_TRUE(page);
+
+  {
+    ScopedFPDFAnnotation annot(FPDFPage_GetAnnot(page, 1));
+    ASSERT_TRUE(annot);
+    ASSERT_FALSE(FPDFAnnot_IsChecked(form_handle(), annot.get()));
+  }
+
+  UnloadPage(page);
+}
+
+TEST_F(FPDFAnnotEmbedderTest, IsCheckedCheckboxReadOnly) {
+  // Open a file with checkbox and radiobutton widget annotations and load its
+  // first page.
+  ASSERT_TRUE(OpenDocument("click_form.pdf"));
+  FPDF_PAGE page = LoadPage(0);
+  ASSERT_TRUE(page);
+
+  {
+    ScopedFPDFAnnotation annot(FPDFPage_GetAnnot(page, 0));
+    ASSERT_TRUE(annot);
+    ASSERT_TRUE(FPDFAnnot_IsChecked(form_handle(), annot.get()));
+  }
+
+  UnloadPage(page);
+}
+
+TEST_F(FPDFAnnotEmbedderTest, IsCheckedRadioButton) {
+  // Open a file with checkbox and radiobutton widget annotations and load its
+  // first page.
+  ASSERT_TRUE(OpenDocument("click_form.pdf"));
+  FPDF_PAGE page = LoadPage(0);
+  ASSERT_TRUE(page);
+
+  {
+    ScopedFPDFAnnotation annot(FPDFPage_GetAnnot(page, 5));
+    ASSERT_TRUE(annot);
+    ASSERT_FALSE(FPDFAnnot_IsChecked(form_handle(), annot.get()));
+
+    annot.reset(FPDFPage_GetAnnot(page, 6));
+    ASSERT_FALSE(FPDFAnnot_IsChecked(form_handle(), annot.get()));
+
+    annot.reset(FPDFPage_GetAnnot(page, 7));
+    ASSERT_TRUE(FPDFAnnot_IsChecked(form_handle(), annot.get()));
+  }
+
+  UnloadPage(page);
+}
+
+TEST_F(FPDFAnnotEmbedderTest, IsCheckedRadioButtonReadOnly) {
+  // Open a file with checkbox and radiobutton widget annotations and load its
+  // first page.
+  ASSERT_TRUE(OpenDocument("click_form.pdf"));
+  FPDF_PAGE page = LoadPage(0);
+  ASSERT_TRUE(page);
+
+  {
+    ScopedFPDFAnnotation annot(FPDFPage_GetAnnot(page, 2));
+    ASSERT_TRUE(annot);
+    ASSERT_FALSE(FPDFAnnot_IsChecked(form_handle(), annot.get()));
+
+    annot.reset(FPDFPage_GetAnnot(page, 3));
+    ASSERT_FALSE(FPDFAnnot_IsChecked(form_handle(), annot.get()));
+
+    annot.reset(FPDFPage_GetAnnot(page, 4));
+    ASSERT_TRUE(FPDFAnnot_IsChecked(form_handle(), annot.get()));
+  }
+
+  UnloadPage(page);
+}
+
+TEST_F(FPDFAnnotEmbedderTest, IsCheckedInvalidArguments) {
+  // Open a file with checkbox and radiobuttons widget annotations and load its
+  // first page.
+  ASSERT_TRUE(OpenDocument("click_form.pdf"));
+  FPDF_PAGE page = LoadPage(0);
+  ASSERT_TRUE(page);
+
+  {
+    ScopedFPDFAnnotation annot(FPDFPage_GetAnnot(page, 0));
+    ASSERT_TRUE(annot);
+    ASSERT_FALSE(FPDFAnnot_IsChecked(nullptr, annot.get()));
+    ASSERT_FALSE(FPDFAnnot_IsChecked(form_handle(), nullptr));
+    ASSERT_FALSE(FPDFAnnot_IsChecked(nullptr, nullptr));
+  }
+
+  UnloadPage(page);
+}
+
+TEST_F(FPDFAnnotEmbedderTest, IsCheckedInvalidWidgetType) {
+  // Open a file with text widget annotations and load its first page.
+  ASSERT_TRUE(OpenDocument("text_form.pdf"));
+  FPDF_PAGE page = LoadPage(0);
+  ASSERT_TRUE(page);
+
+  {
+    ScopedFPDFAnnotation annot(FPDFPage_GetAnnot(page, 0));
+    ASSERT_TRUE(annot);
+    ASSERT_FALSE(FPDFAnnot_IsChecked(form_handle(), annot.get()));
+  }
+
+  UnloadPage(page);
+}
diff --git a/fpdfsdk/fpdf_view_c_api_test.c b/fpdfsdk/fpdf_view_c_api_test.c
index 73df47e..a9897ee 100644
--- a/fpdfsdk/fpdf_view_c_api_test.c
+++ b/fpdfsdk/fpdf_view_c_api_test.c
@@ -60,6 +60,7 @@
     CHK(FPDFAnnot_GetValueType);
     CHK(FPDFAnnot_HasAttachmentPoints);
     CHK(FPDFAnnot_HasKey);
+    CHK(FPDFAnnot_IsChecked);
     CHK(FPDFAnnot_IsObjectSupportedSubtype);
     CHK(FPDFAnnot_IsSupportedSubtype);
     CHK(FPDFAnnot_RemoveObject);
diff --git a/public/fpdf_annot.h b/public/fpdf_annot.h
index ee81ae8..e6e7765 100644
--- a/public/fpdf_annot.h
+++ b/public/fpdf_annot.h
@@ -608,6 +608,18 @@
                       FPDF_ANNOTATION annot,
                       float* value);
 
+// Experimental API.
+// Determine if |annot| is a form widget that is checked. Intended for use with
+// checkbox and radio button widgets.
+//
+//   hHandle - handle to the form fill module, returned by
+//             FPDFDOC_InitFormFillEnvironment.
+//   annot   - handle to an annotation.
+//
+// Returns true if |annot| is a form widget and is checked, false otherwise.
+FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDFAnnot_IsChecked(FPDF_FORMHANDLE hHandle,
+                                                        FPDF_ANNOTATION annot);
+
 #ifdef __cplusplus
 }  // extern "C"
 #endif  // __cplusplus