Flatten PDF
Flatten interactive form fields, comments, and annotations directly into PDF page layers. Lock completed form fields and prevent future modifications to documents.
Your files never leave your device. All processing happens locally in your browser with no file uploads or account required.
How to use flatten pdf
- 01
Choose your PDF
Select the PDF file containing interactive forms or visible annotations.
- 02
Select flattening mode
Choose Form-only mode to preserve vector text or Visual mode to rasterize visible pages and annotations.
- 03
Download flattened file
Save your document with all fields and annotations permanently merged into page content.
Important details & limitations
Form-only mode preserves vector text while flattening supported AcroForms. Visual mode rasterizes visible pages and annotations; text, links and fields lose interactivity. Hidden or unsupported annotations may not render.
Frequently asked questions
What should I know before using flatten pdf?+
Form-only mode preserves vector text while flattening supported AcroForms. Visual mode rasterizes visible pages and annotations; text, links and fields lose interactivity. Hidden or unsupported annotations may not render.
Where are my files processed?+
All document contents remain on your device. Browser JavaScript and WebAssembly perform the work; no files are sent to a conversion service.
What files does flatten pdf support?+
Use unencrypted PDFs; Unlock PDF can first remove encryption using a known password. Up to 100 MB total. Malformed, unusually large, or complex PDFs may exceed browser limits. Editing a signed PDF changes the document and can invalidate its signature.