Flatten a PDF — Make Form Fields Permanent
Bake filled-in form fields into the page so they can no longer be edited or cleared. Free, and entirely in your browser.
Filled in a PDF form and want the answers to become a permanent part of the document that no one can change? Flattening bakes the form fields right into the page content. Everything runs in your browser — your file is never uploaded.
Who uses the flatten tool
- Sending a completed form so the recipient can't alter what you typed.
- Making sure filled-in values look identical in every PDF reader.
- Preparing a document for print or archiving with no interactive fields.
Flatten a PDF in 3 steps
- 1. Upload the PDF that has form fields.
- 2. Press the flatten button.
- 3. Download the flattened copy.
Frequently asked questions
What does "flattening" a PDF mean?
It merges interactive fields (text boxes, checkboxes, dropdowns) into the page content, so the values stay visible but can no longer be edited.
Can I undo it afterward?
A flattened file can't be un-flattened — keep your original editable copy if you might need it later.
What if the file has no form?
You'll get a cleanly rewritten copy of the file; there's simply nothing to flatten when there are no interactive fields.
Is my file uploaded?
No — flattening happens locally in your browser; the file is never sent to any server.