Choose a filled PDF form, check the fields it contains, then flatten it: the values become permanent page content that can no longer be typed over. Runs fully in your browser — nothing is uploaded, and your original file is never changed.
Lock a filled form down: flatten its fields so the answers print, display and archive perfectly — and nobody can type over them.
100% free · No sign-up · No daily limits · No watermarks · Processed in your browser — files never leave your device
Flatten a filled PDF form: every field’s value is baked into the page as permanent content, the fields themselves are removed, and the tool reports exactly how many fields it flattened.
An HR manager receives a completed onboarding form with 23 filled fields. Before filing it, she flattens it: the answers become part of the pages, the file prints identically everywhere, and nobody can later alter the bank details field and re-save it as if it were the original.
Flattening renders each field’s current value into the page content stream using its stored appearance, then removes the field and its annotations from the document. The tool counts the fields before it starts and reports that exact number afterwards, so you always know what was locked. Everything happens in your browser with a PDF library.
Three reasons: the filled values print and display identically in every reader, nobody can edit or clear them afterwards, and some archives and email systems mangle live form fields. Flattening makes a form a finished document.
The tool tells you twice — the list before you start, and the exact count in the done message afterwards, which names the number of fields that were baked in.
Yes — values are rendered from the appearance each field already shows on screen. Checkboxes, radio choices and text all become their visible equivalents.
You can, but the empty fields simply vanish, leaving the form’s printed labels with no way to answer them. Flatten finished forms, not blank ones.
No. Forms often contain personal data, which is exactly why this runs entirely in your browser — the file never leaves your device.