Sign a PDF
Draw or type a signature, drag it onto the page, and download the signed PDF. The file is opened and written entirely in your browser — it's never uploaded to a server.
🔒 Processed locally — nothing is uploadedOne PDF file — it stays on your device
Your signature
The signature appears on the chosen page. Drag it to position it, use the corner handle to resize, or the × to remove it.
Related tools
Most "free PDF signing" sites work by uploading your document to their server, adding the signature there, and sending it back. For a contract, an offer letter or anything with personal details, that's a copy of a private document sitting on someone else's machine. This tool does the whole thing in your browser.
How it works
The PDF is rendered page by page with pdf.js so you can see where you're placing things. You draw a signature on the pad (or type your name in a handwriting style), and the tool trims it to a transparent PNG. You drag that onto the page and resize it; when you download, pdf-lib re-opens the original file, stamps the image onto the pages you chose at the matching coordinates, and saves a new PDF. The original bytes are only ever held in memory on your device.
Is a drawn signature legally valid?
In many jurisdictions (including the US under the ESIGN Act and the EU under eIDAS as a "simple electronic signature") a typed or drawn signature applied with intent to sign is legally recognised for most everyday agreements. It is not the same as a cryptographic digital signature that certifies the document hasn't changed since signing, and some documents (wills, certain property transfers, notarised papers) require more. If a specific contract matters, check its requirements.
Tips for a clean result
- Place the signature over a blank area, not on top of printed text or a line, then nudge it into position.
- Use the same signature on every page that needs one: go to each page and click “Add signature to the page.”
- Blue ink reads as clearly "signed by hand" and stands out from black body text.
When you need a certified digital signature instead
What this tool produces — a signature image stamped onto the page — is different from a certified digital signature made with services like DocuSign's or Adobe Sign's certificate-based option. A certified signature is cryptographically tied to a signing certificate and to the exact bytes of the document at the moment of signing, so any later edit is instantly detectable and the signer's identity can be verified against the certificate issuer. That extra machinery is genuinely necessary for things like notarized documents, some real estate closings, or corporate contracts that specifically require it — check what a given form or counterparty asks for before assuming a drawn signature is enough.
Frequently asked questions
Is my PDF uploaded anywhere?
No. It's opened, rendered and re-saved entirely in your browser. Nothing is sent to a server, and closing the tab discards it.
Can it sign a password-protected PDF?
Not directly — remove the password first (in the app that made it, or your OS "print to PDF"), then sign the unprotected copy.
Will the signature be selectable text or an image?
It's placed as an image on top of the page, so it can't be selected or edited as text — which is usually what you want for a signature.
Does it work on rotated pages?
Yes. Landscape pages and pages saved with a rotation flag (90°, 180° or 270°) are handled: the signature lands exactly where you placed it in the preview and stays upright in any PDF viewer. Pages with a trimmed visible area (a crop box) work the same way.
Is this the same as DocuSign or Adobe Sign's certified signature?
No. This tool stamps a signature image onto the page, which counts as a valid electronic signature for most everyday agreements. DocuSign and Adobe Sign also offer a certificate-based option that cryptographically ties the signature to the document's exact bytes, so later tampering is detectable — that's a different, stronger guarantee reserved for documents that specifically require it.
Can I add multiple signatures to one PDF, or have someone else sign after me?
Yes — add a signature to any page, download, and if someone else needs to sign too, they can open that same file here and add theirs the same way. There's no built-in routing or notification between signers; you'd share the file yourself between each step.