Sign PDF
Visual signature stamp. Ground-only — not certificate eSign.
One PDF file
Draw signature (mouse or touch):
PDF coordinates: origin bottom-left of the page (standard PDF points, 72 pt = 1 inch).
How to use Sign PDF free
- Drop PDF.
- Draw signature.
- Set page/position.
- Stamp.
Why GroundPDF?
- No upload — documents stay on your computer.
- No account, no daily limits.
- Ground vs cloud — your file doesn’t earn frequent-flyer miles.
- Offline after first load.
Sign PDF FAQs
How do I sign a PDF?
Drop a PDF, draw your signature, place it on the page, then download the signed file.
Is e-sign legally binding?
Requirements vary by jurisdiction and document type. GroundPDF provides a simple visual signature stamp — check local rules for formal contracts.
Is sign PDF private?
Yes. Signing runs on your device with no upload.
Do you upload my files?
No. GroundPDF processes files entirely in your browser with WebAssembly. Files never leave your device — nothing is uploaded to a server.
Is it free?
Yes. Free to use with no account and no daily limits.
Which devices and browsers work?
Any modern browser with WebAssembly support: Chrome, Firefox, Safari, and Edge on desktop or mobile.
How is this different from iLovePDF or Smallpdf?
Those tools upload your files to the cloud. GroundPDF runs on your device (on the ground, not in the cloud), so your documents stay private by design.