Flatten PDF
Turn filled-in form fields, comments and signatures into permanent parts of the page — so they look the same everywhere, print reliably, and cannot be edited or cleared.
- Processed on your device
- No upload, no waiting
- No signup, no watermark
How it works
Add your PDF
Drop the filled-in form or annotated document onto the page.
Choose what to flatten
Form fields, comments and signatures, or both — whichever needs locking down.
Download
You get a PDF where everything is ordinary page content. Links keep working.
Frequently asked questions
Why would I flatten a PDF?
Because a filled-in form is not really filled in: the answers live in interactive fields that another reader can clear, re-edit, or render differently — and some printers leave them out entirely. Flattening makes the answers part of the page, so what you see is exactly what the recipient sees and prints.
Can I still edit the form after flattening?
No, and that is the point. Keep your original if you may need to change the answers later — flattening cannot be undone.
Does it remove my hyperlinks?
No. Links are deliberately left working; only the things with a visual appearance are burned in.
Are my signatures preserved exactly where I put them?
Yes. Each annotation's appearance is placed using the PDF specification's own mapping from its appearance box to its rectangle, which is what keeps stamps and signatures at the right size and position instead of drifting.
Is my PDF uploaded?
No. Flattening runs entirely in your browser — relevant here, since flattened documents are usually signed forms and contracts.
Good to know: Digital signature certificates are not preserved: flattening rewrites the page content, which invalidates a cryptographic signature by design. Hidden annotations stay hidden rather than being made visible. Annotations without a stored appearance (rare, and reader-dependent) are left as they are.