Flatten a PDF
Drop a PDF and download a flattened version — form fields and annotations are baked into the page content so the file renders identically everywhere and can no longer be edited. Everything runs in your browser; your file never leaves your device.
About flattening PDFs
A PDF form stores fields (text boxes, checkboxes, signatures) as interactive objects layered on top of the page. Flattening merges those objects directly into the page content: the values you filled in become permanent marks on the paper, and the fields disappear. The result is a simpler, more portable file that looks the same in every viewer. If the PDF has no form fields, it is re-saved cleanly — useful for stripping invisible annotation layers.
Is it private?
Yes. The converter runs entirely in your browser using pdf-lib, a pure-JavaScript library. Nothing is uploaded, stored, or seen by us — there is no server involved.
Frequently asked questions
- What does flattening a PDF do?
- It merges interactive objects like form fields and annotations directly into the page content. The values you filled in become permanent marks on the page, and the fields disappear, so the file looks the same in every viewer but can no longer be edited.
- Is my file uploaded to a server?
- No. The flattening runs entirely in your browser using pdf-lib, a pure-JavaScript library. Your file is never sent anywhere, and there is no server involved.
- Is it free, and do I need an account?
- It is free with no watermarks, no daily caps, and no sign-up. Drop a file, flatten it, and download the result.
- What happens if my PDF has no form fields?
- It is re-saved cleanly, which is useful for stripping invisible annotation layers. You still get a simpler, more portable file back.