Is my PDF or signature uploaded anywhere?

No. Your signature and the PDF are handled entirely in your browser with pdf-lib — nothing is uploaded and there's no signup.

Can I place the signature on any page?

Yes. Use the page arrows to choose a page, then drag the signature exactly where you want it.

Is this a legally binding e-signature?

It adds a visible signature image to the document. For a legally certified digital signature (with a cryptographic certificate), use a dedicated e-signature service.

Can I sign a password-protected PDF?

Remove the password first, then sign the unlocked PDF.

Sign PDF

Draw your signature and place it anywhere on a PDF, then download the signed file — all in your browser, nothing uploaded.

1. Draw your signature

Draw above with your mouse or finger.

2. Upload the PDF and place your signature

Processed 100% in your browser — nothing you enter here is ever uploaded.

Common use cases

Sign a contract

Add your handwritten signature to an agreement without printing and scanning.

Approve a document

Place your signature on a form or letter and send it back in minutes.

Sign on any device

Draw with a finger on your phone or tablet — no app or account needed.

How to use the Sign PDF

Draw your signature in the pad with your mouse or finger. Use Clear to redo it.

Drop a PDF into the box, or click to browse. It's processed in your browser — nothing is uploaded.

Pick the page, drag your signature to the right spot, and adjust its size with the slider.

Click "Sign & download" to save the signed PDF.