How to flatten a PDF

Quick steps

1. 1Fill out the form with the Fill Forms tool if you haven't already.
2. 2Open Flatten PDF and add the completed file.
3. 3Download the flattened PDF — the values are now permanent.

What “flattened” means

An interactive PDF keeps form fields as separate, editable objects layered over the page. Flattening draws those values directly onto the page and removes the editable fields, so what you see is now permanent page content.

When to flatten

Flatten a filled-in form before emailing it so the recipient can't change your answers. It's also useful when a form displays differently across PDF viewers — flattening locks the appearance.

Many e-signature and archival workflows expect a flattened file for exactly these reasons.

How to flatten

Open Flatten PDF, add your file, and download. Form field values are baked in; a PDF that has no form is simply passed through unchanged.

Private by design

Flattening runs in your browser, so the completed form — often full of personal details — never leaves your device.

Frequently asked

What does flattening a PDF do?

It merges interactive form fields into the page as fixed content and removes the editable fields, so the values can no longer be changed.

Should I flatten a form before sending it?

Usually yes — flattening locks your answers so the recipient sees exactly what you entered and can't edit the fields.

Can I edit a flattened PDF afterward?

Not as form fields — the values are now part of the page. Keep an unflattened copy if you might need to change them later.

Is the file uploaded?

No. Flattening happens in your browser, so the document stays on your device.