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Flatten PDF

Turn filled form fields and annotations into permanent page content.

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This tool runs in your browser. Nothing is uploaded.

About Flatten PDF

Flatten PDF merges form fields, comments and stamps into the page itself, so the filled-in values can no longer be edited and look identical in every viewer.

For submitting completed application forms, archiving signed documents and preventing accidental edits.

What it does

  • Flattens form fields and annotations
  • Generates missing appearances first so values are not lost
  • Keeps text selectable

How to use Flatten PDF

  1. Upload a filled PDF form.
  2. Select Flatten PDF.
  3. Download the flattened copy.

Frequently asked questions

Can I edit the form after flattening?

No. Keep the original if you might need to change answers.

Why did a checkbox disappear?

Some forms rely on scripts to draw values. Scripts are never run here, so values without a stored appearance may not show.

Limits and privacy

Fields that only render through JavaScript cannot be flattened.

Everything happens on your device, so your content never reaches our server.

Processing speed depends on your device. Files up to 100 MB are supported; very large documents work best on a computer.

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