Flatten PDF annotations
Make markups permanent, without uploading the file.
Annotations like highlights and comments can show differently, or disappear, in some readers. Flattening merges them into the page so they always display. This tool does it in your browser, so the document is never uploaded.
How to flatten PDF annotations
- 1
Add your PDF
Drop in the annotated document.
- 2
Flatten
The annotations are merged into the page on your device.
- 3
Download
Save the flattened PDF, where the markups are permanent.
Why flatten annotations locally
Flattening markups in the browser keeps the document on your machine, with no upload needed to make comments stick.
Frequently asked questions
Why do annotations sometimes vanish?+
Some readers hide or render annotations differently. Flattening bakes them in so they always appear.
Is my file uploaded?+
No. It runs in your browser and the file never leaves your device.
Can I still edit the comments?+
No, once flattened they are part of the page; keep the original if you need to edit them.
Is it free?+
Yes, with no sign-up.