How to use Flatten PDF
- Choose the PDF you want to flatten.
- Pick Form fields to keep text sharp, or Everything to also lock comments.
- Press Flatten PDF and download the result.
Make answers and signatures final
After filling in a form, flattening makes your answers part of the page, so they print correctly everywhere and can't be edited by the next person. “Everything” rebuilds each page as an image, which also locks comments, highlights and stamps.
Private by design
Flatten PDF runs entirely in your browser. Your file is processed on your own device and is never uploaded to a server, there's no sign-up, and the result is ready to download as soon as it's done.
Questions
What's the difference between the two modes?
Form fields keeps text sharp and selectable. Everything turns pages into images and locks all annotations.
Can I unflatten a PDF?
No. Keep your original if you might need to edit it again.
When should I flatten?
Before sending a signed or completed form to someone else.