Flatten PDF
Flatten a PDF's fillable form fields into the page so the entered values become permanent and can no longer be edited or cleared. Upload, click Flatten and download — everything runs in your browser, so your PDF is never uploaded.
How to flatten a PDF
- Add your PDF above — it's read straight into your browser and never uploaded.
- We detect any fillable form fields and show how many will be flattened.
- Click Flatten to bake them into the page, then download the flattened PDF.
About flattening PDFs
A PDF form has interactive fields — text boxes, checkboxes, radio buttons and dropdowns — that anyone can change. Flattening draws those fields’ current values directly onto the page and removes the interactivity, so the document becomes a fixed, read-only record of what was filled in.
Flattening is the usual final step before sending a completed form: it guarantees the values render identically everywhere and can’t be accidentally (or deliberately) altered. This tool flattens entirely in your browser, so your document is never uploaded or stored on a server.
Frequently asked questions
What does flattening a PDF do?
Flattening converts interactive form fields (text boxes, checkboxes, dropdowns) into static page content, so the filled-in values are baked in and can no longer be changed.
Why would I flatten a PDF?
To lock a completed form before sharing it, to make sure it looks the same in every viewer, or to stop the values being edited or cleared.
What if my PDF has no form fields?
Then there's nothing to flatten — the tool simply saves a clean, finalized copy of the document.
Is my PDF uploaded?
No. Flattening happens entirely in your browser; your file never leaves your device.