About Sign PDF
Sign PDF places a signature image onto a document. Upload a photo or scan of your signature, then position and size it on the page where it belongs.
This produces a visible, stamped signature — the electronic equivalent of signing a printout and scanning it back, which is what is normally expected for everyday agreements and forms. It is not a certificate-based digital signature, so Acrobat will not show a cryptographic validation badge. If your situation requires that, you need a certificate-based signing service.
Your signature image is handled entirely in the browser and never uploaded, which matters more here than for most tools — a signature image is worth protecting.
How to use Sign PDF
- Open the PDF you need to sign.
- Upload an image of your signature.
- Drag it into position on the page and resize it to fit the signature line.
- Save and download the signed PDF.
Frequently asked questions
Is a signature added this way legally binding?
Many jurisdictions accept an electronic signature for ordinary agreements, and a stamped signature image is the common form of one. Requirements vary by country and by document type, so check what applies to yours — some documents specifically require a certificate-based signature or a witnessed wet signature.
How do I get a clean signature image?
Sign on plain white paper with a dark pen, photograph or scan it in good light, and crop tightly around the signature.
Can others edit or remove my signature?
It is drawn into the page like any other content, so it cannot be toggled off — but a stamped image offers no cryptographic proof of who signed. That is the difference between this and a certificate-based signature.