Flatten PDF
Make form fields part of the page so they cannot be changed
Flattening turns form boxes, ticks and drop-downs into plain page content, so they can no longer be changed.
Private: everything happens in your browser. Nothing is uploaded.
How to use the Flatten PDF
- Choose your filled-in PDF.
- Click Flatten PDF.
- Download the flattened file.
About this tool
After you fill in a PDF form, flattening makes your answers a permanent part of the page. The boxes disappear, the text stays, and nobody can change it by accident.
It also helps when a form looks different in different viewers. Flatten, and everyone sees the same thing. The work is done on your device.
- Form answers become plain page text
- Looks the same in every viewer
- No watermark
- Nothing is uploaded
Frequently asked questions
What does flattening a PDF do?
It merges the form fields into the page. The filled-in text and ticks stay visible, but they can no longer be edited.
Can I undo flattening?
No, so keep your original file if you may need to edit the form again.
Does it work on a PDF with no form?
Yes, it just saves a clean copy.
How do I fill in a form first?
Use the Fill PDF Form tool, then flatten the result.