PDF

Flatten PDF

Turn a filled-in PDF form into a fixed document — the values become part of the page and can no longer be changed or cleared.

How to flatten pdf

  1. 1

    Add your file

    Drop your file into the box above or click to browse. It's processed privately in your browser — nothing is uploaded.

  2. 2

    Choose your options

    Adjust the available settings to get exactly the result you need.

  3. 3

    Download the result

    Run the tool and download your file instantly — no sign-up, no watermark.

About Flatten PDF

A PDF form stays editable after you fill it in. That is helpful while you are working and a problem once you send it: the recipient can change an amount, a reviewer's software can reset a field, and different viewers can render the same form in visibly different ways.

Flattening ends that ambiguity. The text you typed, the boxes you ticked and the options you selected are painted into the page itself, and the interactive layer is removed. The result opens identically everywhere and cannot be altered without leaving a trace.

It is the right final step for anything being submitted rather than collaborated on — an application, a signed agreement, a timesheet, a claim. Keep the unflattened original in case the answers change, and send the flattened copy.

Frequently asked questions

What does flattening actually do?+

The values currently in the form fields are drawn onto the page content, then the interactive fields are removed. Visually nothing changes; structurally the document stops being a form.

Why would I flatten a form?+

So the recipient sees exactly what you sent. An unflattened form can be edited, reset or rendered differently by another PDF viewer — flattening removes all three risks.

Can flattening be undone?+

Not from the flattened file. Keep the original if you might need to change the answers later.

What if the PDF has no form fields?+

You get a clean re-saved copy and a note saying no fields were found. Nothing is damaged.

Does it flatten annotations and comments too?+

This version flattens form fields, which is what "flatten" means for a filled-in form. Comment markup is left as it is.

Is my filled-in form uploaded?+

No. Flattening runs in your browser, so completed forms containing personal or financial details never leave your device.

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