Flatten Forms

Local

How it works

  1. 1Upload the PDF
  2. 2Flatten locally
  3. 3Download the locked copy

Flattening happens locally in the browser.

Common uses

  • Lock a completed form
  • Preserve filled values
  • Avoid viewer compatibility issues

Useful after editing or signing when you want a more universally viewable result.

Frequently asked questions

Is Flatten Forms free to use?

Yes. Flatten Forms is completely free — no signup, no watermarks, and no file limits. It runs locally in your browser, so there is no server cost to pass on.

Is my file uploaded to a server?

No. Flattening happens locally in the browser. Processing happens with JavaScript in your browser, so your document never leaves your device.

Does Flatten Forms work offline?

Yes. Once the page has loaded, processing runs entirely on your device, so it keeps working without an internet connection.

What file types does Flatten Forms accept?

Flatten Forms accepts PDF files and produces a Flattened PDF. Useful after editing or signing when you want a more universally viewable result.

Do I need to install any software?

No. Flatten Forms works in any modern browser — Chrome, Firefox, Safari, or Edge — on Windows, macOS, Linux, iOS, and Android. There is nothing to download or install.

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