Flatten a PDF form

Flattening merges the visible appearance of every form field into the page and removes the interactive field. Use it before sharing a completed form so values cannot be altered by accident.

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How to use Flatten PDF Forms

Select a filled PDF form.
Press Flatten.
Check the reported number of fields flattened.
Download the flattened PDF.

Supported formats

Input: PDF with form fields
Output: PDF

Appearance

Field appearances are regenerated with a standard font before flattening, so text should match what you typed.

Not a security measure

Flattening makes accidental edits harder but is not encryption or tamper-proofing.

Limitations

Form fields only – comments and other annotations are untouched.

Privacy

Files you choose are read into your browser’s memory and processed on your device; they are not uploaded to a server. Temporary download links are released after use, and the offline cache never stores your documents. More about privacy and limits.

Frequently asked questions

What if the PDF has no fields?

The tool tells you there is nothing to flatten and does not produce a file.

Are annotations such as comments flattened?

No, only form fields.