Flatten PDF
Flatten PDF form fields, comments and annotations into the page so they can no longer be edited.
Your files are processed in your browser and never uploaded.
Filled-in form fields, comments, highlights, stamps and signatures become part of the page, so they can no longer be changed. Text stays sharp and selectable, and links keep working.
The strongest option: every page becomes a picture of itself. Nothing can be edited, copied or filled in, but text can no longer be selected or searched.
Flatten PDF
A filled-in PDF form can still be changed by whoever receives it, and comments and highlights can be moved or deleted. Flattening makes them a permanent part of the page. Choose "Flatten forms and comments" to keep text sharp and selectable, or "Turn every page into an image" for the strongest lock, where nothing can be edited or copied.
How to use Flatten PDF
- Choose a PDF. The tool shows how many form fields and comments it has.
- Pick how to flatten it.
- Click Flatten PDF.
When it comes in handy
- Sending a filled-in form so the answers cannot be changed.
- Making comments and highlights show in every PDF viewer and printer.
- Preparing a signed document for sharing.
Frequently asked questions
- Why do my form answers not show in some apps?
- Some viewers, especially on phones, do not display form fields properly. Flattening turns the answers into normal page content, so they show everywhere.