✍️ Sign PDF
Draw your signature, then drag it onto a live preview of the page to place it exactly where you want, resize it, and download the signed PDF — all on your device.
Draw your signature, then drag it to exactly where it should go on the live page preview and resize it — what you see is where it lands. It\'s stamped onto the PDF with pdf-lib and downloaded, all in your browser, so a private contract never leaves your device. This is a visual signature for everyday forms, not a certificate-based digital signature. 🔒
How the sign pdf works
Open your PDF and it renders a live preview of the page. Draw your signature on the pad with a mouse, trackpad or finger, then drag the signature directly onto the page preview to position it precisely and use the slider to resize it — what you see is exactly where it lands. When you click sign, the signature is stamped onto that spot with pdf-lib and the signed PDF downloads. The whole process runs locally in your browser, and you can flip between pages to sign a multi-page document.
Signing usually means handling exactly the kind of private document you shouldn't upload — a contract, form or agreement — which is why this never sends your file anywhere. The signature is flattened onto the page as an image at the position you dragged it to. This is a simple visual signature for everyday forms; it is not a cryptographic/digital signature and doesn't provide legal certificate-based authentication.
Frequently asked questions
How do I sign a PDF?
Open the PDF, draw your signature on the pad, then drag it onto the live page preview where you want it and resize it. Click Sign & download to get the signed PDF — created in your browser, no account or upload.
Can I place the signature anywhere on the page?
Yes. Once you've drawn it, drag the signature around the live page preview to position it exactly, and use the size slider to make it bigger or smaller. It's stamped where you drop it. On a multi-page PDF, use the page arrows to sign a specific page.
Can I sign on my phone?
Yes — the signature pad and the drag-to-place preview both accept finger or stylus input, so you can draw and position your signature by hand on a touchscreen.
Is my document uploaded to sign it?
No. The PDF is previewed, read and rewritten entirely in your browser with pdf.js and pdf-lib, so contracts and other private documents stay on your device.
Is this a legally binding digital signature?
It adds a visual (image) signature, which is enough for many everyday forms and agreements. It is not a certificate-based cryptographic digital signature; for those you need a dedicated e-signature service with identity verification.