Flatten PDF online — free
Make forms and annotations permanent
No sign-up required. Drop your files and download in seconds.
Upload a PDF with forms or annotations to flatten.
Drop files here
PDF, images, text, HTML, RTF up to 25MB
What is Flatten PDF?
Flatten PDF merges form field values and annotations into the page content so they can't be changed.
How to flatten pdf online
- 1
Upload your PDF.
- 2
Click Flatten PDF.
- 3
Download the flattened document.
Frequently asked questions
What does flattening do?
Form fields and annotations become part of the page — they can't be edited afterward.
When should I flatten?
Before final distribution of filled forms or signed documents.
Is it free?
Yes — free with instant download.
Related free PDF tools
Need a synced library on web and iOS? Sign in to save your files.