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.
Your file is processed in your browser and never uploaded.
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.