Sign PDF

How to use the Sign PDF

1. Choose a PDF. The last page is shown first, because that's where signatures usually go.
2. Draw your signature with a mouse, finger or stylus, or type your name, then select Use this signature.
3. Click the page to position it, adjust the size, then select Sign PDF and download the new file.

Examples

• Sign a form or letter. Place your signature above the signature line on the last page.
• Initial a specific page. Choose the page number, draw your initials and make them small.
• No touchscreen? Type your name; it's rendered in a handwriting-style font from your device.

What kind of signature this adds

The signature is turned into a transparent PNG in your browser and drawn onto the chosen page with pdf-lib. The rest of the PDF is copied unchanged, and rotated pages are handled so the signature appears upright.

This is a visual (electronic) signature, like signing a printout. It is not a certificate-based digital signature: it doesn't identify the signer cryptographically or reveal later edits. Whether a visual signature is acceptable depends on the document and where it's used, so check if a qualified or certificate-based signature is required.

Important: adding a signature re-saves the PDF, which can invalidate certificate-based digital signatures already in the original file.

Your PDF and signature never leave this browser and aren't stored after you close the page.