Flatten PDF
Flatten a PDF's fillable form fields — text boxes, checkboxes, radio buttons, dropdowns — into permanent, non-editable page content. Runs entirely in your browser; your file is never uploaded.
Input
Flattening runs entirely in your browser — nothing is uploaded.
Flattened PDF
Upload a PDF with fillable form fields and press Flatten PDF. The flattened file is built in your browser — download it when you're ready.
Guides
Flatten PDF bakes a PDF's fillable form fields — text boxes, checkboxes, radio buttons, dropdowns — into permanent, non-editable page content, right in your browser. The values you (or someone else) already entered stay visible, but the form itself is gone: no more clicking into fields, no risk of a viewer accidentally changing an answer. No signup, and nothing ever leaves your device.
How to use it
- Upload a PDF that has fillable form fields, already filled in with the values you want to keep.
- Press Flatten PDF. The flattened file downloads automatically as
flattened.pdf.
Why flatten a PDF's form?
A filled-out PDF form is still editable by anyone who opens it — a signed waiver, a submitted application, or a completed tax form can be altered after the fact unless the form is flattened. Flattening locks the current values in place as regular page content, so the document reads and prints exactly the way it looked when you flattened it, with no interactive fields left to tamper with.
Does this remove the form fields entirely?
Yes — after flattening, the fields' current values are drawn directly onto the page and the underlying AcroForm fields are removed. The result is a plain, static PDF; it can't be re-opened as a fillable form.
What if my PDF has no form fields?
The tool tells you there's nothing to flatten. If you need to fill the form first, most PDF readers (Adobe Acrobat, Preview, Chrome's built-in viewer) let you type into the fields and save — then run the saved file through this tool.
Will this work on a password-protected PDF?
A PDF with an owner lock but no open password usually flattens fine. A file that requires a password just to open must be unlocked first — use the Unlock PDF tool, then flatten the result.
Your file is processed entirely on your device and is never uploaded. To add a permanent stamp instead of locking existing form values, see Watermark PDF.