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Flatten PDF guide

How to flatten interactive PDF form fields

Complete and review supported form fields first, then turn their current values into fixed page content.

Updated September 2026 · PDFKaka EditorialOpen Flatten PDF
Capture the Flatten PDF workspace at 1366×768 with synthetic sample content and the controls used by this workflow visible.

Flatten the supported form fields

  1. Open the flattened copy and confirm values are visible and no longer interactive.
  2. Choose a PDF that contains supported AcroForm fields.
  3. Confirm that the entered values are correct before flattening them.

What Flatten PDF actually flattens

Flattens supported AcroForm fields only, not every annotation, layer, signature, or security feature.

FAQ

Does Flatten PDF flatten every annotation and layer?

No. The current workflow is for supported AcroForm fields; it should not be treated as a universal layer, annotation, or signature flattener.

What is the current input limit for Flatten PDF?

PDF; One PDF ≤50 MiB, ≤500 pages, ≤200 form fields.

What does Flatten PDF create?

Flattens supported AcroForm fields into fixed page appearance; it does not flatten every PDF layer. One PDF ≤150 MiB with fixed field appearance.

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