Processed on your device — never uploaded
Sign a PDF
Draw your signature, apply it anywhere
Drop a file here, or browse
.pdf — processed on your device, never uploaded
How it works
- 1
Drop the document that needs a signature.
- 2
Draw your signature and pick pages, position and size.
- 3
Apply and download the signed PDF.
Why FoldPDF
- Files processed 100% locally — verifiable in DevTools
- No file size or daily usage limits
- No watermarks, no accounts, no paywalls
- Works offline once loaded
Frequently asked questions
Is this sign pdf tool really free?+
Yes — every FoldPDF tool is free with no file limits, watermarks, or sign-up. Processing runs on your own device, so it costs us nothing to serve.
Are my files uploaded to a server?+
No. Files are processed entirely inside your browser using WebAssembly. You can verify with your browser's developer tools that no file data is transmitted.
How does sign pdf work?+
Draw a signature once with your mouse or finger, then stamp it onto any pages of a PDF — sized and positioned automatically. The signature never leaves your device.