Flatten a PDF
Lock filled in forms, comments, and stamps into the page, so the PDF looks the same everywhere and nobody can edit the answers.
Drop a PDF, or choose a file
PDF files of any size.
Your file never leaves your device
What flattening does
Form fields, check boxes, comments, highlights, and stamps sit on top of a PDF's pages as separate objects that anyone can change. Flattening draws each one into the page exactly as it looks, then removes the editable layer.
When to flatten
Flatten a filled in form before you send it, so the answers can't be changed by accident and look the same in every reader. It also helps when a form's answers show up blank in some apps or when printing.
What stays the same
Page text stays sharp and selectable, links stay clickable, and the layout doesn't move. Hidden comments and popup notes, which never show on the page, are removed.
How to flatten a PDF
- 1
Add your PDF
Drag your PDF onto the box, or click Choose a file. It opens right in your browser. Nothing is uploaded.
- 2
Choose what to flatten
Everything flattens form fields, comments, and markup. Form fields only leaves comments editable.
- 3
Click Flatten PDF
Each field and comment is drawn into the page exactly as it looks, then the editable layer is removed.
- 4
Download the result
Click Download to save the flattened PDF. The original file is left exactly as it was.
Questions
Can I flatten only the form and keep comments?
Yes. Choose Form fields only. Every form field is drawn into the page, and comments and markup stay editable.
Can I undo flattening?
No. The fields become part of the page. Keep the original if you might need to change an answer.
Is flattening the same as redacting?
No. Flattening keeps everything visible and only stops editing. To remove private details for real, use Redact PDF.
What about digital signatures?
Changing a digitally signed PDF in any way breaks its signature, and flattening is a change. Flatten before signing, not after.
My PDF is password protected
Unlock it first with Unlock PDF, then flatten it.
Is my PDF uploaded?
No. It's flattened on your device.