PDF Signature Adder
Draw your signature with your mouse or finger, then stamp it onto a PDF at the position you choose. Everything happens locally in your browser.
How to Use the PDF Signature Adder
- Choose the PDF file you want to sign.
- Draw your signature in the box using your mouse or finger, or click "Clear Signature" to redo it.
- Set the X/Y position and width for where the signature should appear (default is bottom-right of the page).
- Optionally check "Add to all pages," then click "Add Signature & Download."
Why Use This Tool?
Is my PDF or signature uploaded anywhere?
No. Your signature is drawn on an HTML canvas and embedded into the PDF entirely inside your browser using the PDF-lib library. Neither the document nor your drawn signature image is ever sent to a server.
How do I position my signature correctly?
X and Y are measured in PDF points from the bottom-left corner of the page (72 points per inch). The default values place the signature near the bottom-right of a standard page — adjust the numbers and re-run to fine-tune placement, since there's no live drag-to-position preview.
Is this a legally binding electronic signature?
This tool visually stamps a drawn image of your signature onto the page — it does not implement cryptographic e-signature standards (like those used by dedicated e-signing services), so it's best suited for informal sign-offs rather than legally binding digital signatures requiring audit trails.
Can I sign every page automatically?
Yes, check "Add signature to all pages" before clicking "Add Signature & Download" to stamp the same signature at the same position on every page.