Flatten PDF
Lock in filled form field values so the PDF can no longer be edited.
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Information
How to use Flatten PDF
Upload a PDF that has a filled-in form and flatten it — no other input needed.
Why it helps
Locks in whatever values are currently in a form's fields so the document reads as final, not editable.
No installation required
No signature app or PDF editor to install — draw, type, or place elements directly on the page here.
Your files stay private
Signed and edited documents are processed for this request only; we don't keep a copy after you download.
Works on any device
Sign a lease from your phone or edit a contract from a work laptop — the tool works the same either way.
Frequently asked questions
What does flattening a PDF do?
It locks in whatever values are currently filled into a form's fields so the document reads as final text instead of an editable form.
Can I flatten a PDF that has no form fields?
No — flattening only applies to a PDF with fillable form fields; if there aren't any, there's nothing to lock in.
Can a flattened PDF be un-flattened later?
No, flattening is permanent — keep an unflattened copy if you might need to edit the form fields again.