Flatten PDF
Lock in filled forms and annotations so nobody can change them.
Tap to choose a file
How it works
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Choose or drop the PDF with filled forms or annotations.
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Decide whether to flatten everything or only the form fields.
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Click Flatten PDF.
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Download the flattened, uneditable copy.
Frequently asked questions
What does flattening a PDF mean?
Interactive elements — form fields, checkboxes, signatures, comments, and stamps — are converted into permanent page content. The values stay visible, but they can no longer be clicked, edited, or accidentally cleared.
When should I flatten a PDF?
Before submitting a filled-in form or signed document. It guarantees the content displays the same in every PDF viewer and that nobody can change what you entered.
What does "flatten only form fields" do?
It makes just the form fields permanent while leaving other annotations (like comments and highlights) editable. Leave it off to flatten everything.
What happens to my file?
It's processed on our server and automatically deleted within 1 hour. We never read or share your documents.
What's the maximum file size?
100 MB per PDF.
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