Flatten PDF Online
Lock filled-in forms so they can't be changed, or merge everything on the page into a single layer.
How it works
- Choose or drop one or more PDFs.
- Pick "Form fields" or "Everything".
- Press Flatten PDF and download.
Frequently asked questions
What does flattening a PDF do?
Interactive parts — form fields, and optionally comments, annotations and layers — become ordinary, fixed page content that can't be edited.
Will my text still be selectable?
With "Form fields", yes. "Everything" turns pages into images, so text isn't selectable afterwards.
Can I flatten several PDFs at once?
Yes. Select several files and download them all as a ZIP.
Are my files uploaded?
Your files are processed in your browser and never uploaded to a server.