Flatten PDF — Flatten PDF bakes interactive form fields — text boxes, checkboxes, radio buttons — into the page itself. After flattening, the values you (or anyone) entered become ordinary page content that no viewer can change, and the file no longer depends on the filling app to render correctly.
Your PDF is flattened locally in your browser and never uploaded.
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What is flatten pdf?
Flatten PDF bakes interactive form fields — text boxes, checkboxes, radio buttons — into the page itself. After flattening, the values you (or anyone) entered become ordinary page content that no viewer can change, and the file no longer depends on the filling app to render correctly.
This is the final step before archiving or sharing a completed form: it guarantees what you see — including signatures — is exactly what everyone else sees.
How to use it
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Choose the filled PDF
A document with form fields or filled data.
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Flatten it
Fields are converted to static page content.
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Download the flat copy
The result has no editable fields left.
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Last reviewed: 2026-09-24