Skip to main content
Mofumi PDF

Flatten PDF

Turn form fields, comments and stamps into ordinary page content so they can’t be changed.

100% Private — files never leave your device
Upload PDFDrop files here or click to chooseAccepted: PDF Files never leave your device

About this tool

Flatten PDF merges interactive elements into the page itself. Filled-in form fields become plain text and graphics, and annotations such as comments, highlights, stamps and drawn ink are drawn into the page exactly as they appear. The result looks the same but can no longer be edited by clicking on it.

Flattening is the standard last step before printing or archiving: it makes sure every reader and printer shows the same thing, and that nobody can quietly change a value in a submitted form. Links are kept, and comments without a visible appearance are left as they are.

Choose whether to flatten forms, annotations or both. Flatten PDF is used in the Print Ready, Full Optimization and Archive Preparation workflows.

Engines: pdf-lib

How to use

  1. 1

    Upload the filled form or annotated PDF.

  2. 2

    Choose to flatten forms, annotations or both.

  3. 3

    Click Flatten PDF and download the result.

Use cases

  • Submit final forms

    Lock in the values of an application or tax form before sending it.

  • Print exactly what you see

    Avoid printers that skip form fields or comments.

  • Archive reviews

    Keep reviewers’ highlights and stamps as a permanent part of the record.

Frequently asked questions

Will my form values disappear?

No. Their appearance is drawn onto the page; only the editable field is removed.

Are links kept?

Yes. Link annotations are not flattened, so they still work.

Can I flatten only the form fields?

Yes. Turn off Annotations to keep comments editable.

You may also like