Private— Processed on this device
Flatten a filled PDF form
Flatten PDF on ilovspdfs draws a filled form's answers permanently onto the page and removes the interactive fields, so the next person to open it cannot change them. It runs in your browser. A PDF with no form fields is refused rather than re-saved.
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.pdf · up to 100.0 MB
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About this tool
Once a form is filled in, the values still sit in editable boxes — anyone who opens the file can retype them, and some readers show a warning about unsaved changes. Flattening merges the answers into the page itself, which is what you want before emailing a completed application or filing a signed copy.
How to flatten a filled PDF form
- 1Open your filled-in PDF form.
- 2Check that the answers you expect are shown.
- 3Download the flattened document.
At a glance
| What it does | Lock a filled form so its answers cannot be edited. |
|---|---|
| Where it runs | In your browser, on this device. The file is never uploaded. |
| Accepts | |
| Files per job | One at a time |
| Maximum file size | 100 MB |
| Price | Free. No account, no sign-in, no watermark. |
| Status | Working |
Questions
- Do my files get uploaded to a server?
- No. This tool runs entirely inside your browser tab. Your file is read into memory, changed on your own machine, and handed straight back to you as a download. Nothing is transmitted, so there is nothing on our side to store or delete.
- Can the answers be edited after flattening?
- Not as form fields — the boxes are gone and the values are part of the page. A determined person with a PDF editor can still alter the page itself, so flattening is about preventing accidental changes, not about tamper-proofing.
- Why does it say my PDF has no form fields?
- Because there is nothing to flatten. Rather than re-save the file unchanged and let you believe something happened, the tool stops. If you wanted to stop the text being selectable, convert the pages to images instead.
- Does it work without an internet connection?
- Once the page has loaded, yes. The processing code runs locally, so you can disconnect and the tool will still work. That is also a simple way to verify the privacy claim for yourself.
Also called Flatten a PDF form, Lock PDF form fields, Make a PDF uneditable.