Flatten PDF
Make your PDF uneditable by flattening forms and annotations
Lock in form answers and annotations by flattening them into the page, so nobody can change them later.
- Forms and annotations become fixed
- Done in seconds
- Free, no sign-up, no watermarks
How it works
How to flatten a PDF
- 01
Drop one or more PDFs into the upload area, or click to browse.
- 02
Click Flatten PDF.
- 03
Download your flattened PDF, or a ZIP of several files.
Form fields fixed
Filled-in form fields become plain text on the page and can no longer be edited.
Annotations merged
Comments, highlights and drawings are merged into the page, so they look the same in every viewer.
Batch friendly
Flatten several PDFs at once and download them together as a ZIP.
Questions
Frequently asked
What does flattening a PDF do?
It turns form fields, comments and drawings into part of the page itself, so they can't be edited by form fillers or annotation tools.
When should I flatten a PDF?
Before sending a completed form or signed document, or when annotations do not display correctly in another viewer.
How long does it take to flatten a PDF?
Usually just a few seconds. Very large files can take a little longer.
Is Flatten PDF free?
Yes. It is free to use, with no sign-up and no watermarks added to your files.
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