Sign a PDF
Drop a PDF here, or click to browse
Your file never leaves your browser
Signing a document online normally means uploading it to somebody's server, creating an account, and hitting a monthly limit. This tool does none of that. Draw your signature with a mouse, finger or stylus — or type your name — then click where it should sit on the page. The signature is drawn into the PDF right in your browser, so a contract, offer letter or agreement never leaves your device. There is no account, no watermark and no limit on how many documents you sign.
Nothing is uploaded, which matters most here
Of everything on this site, a signature is the piece of data most worth protecting — it appears on contracts, bank forms and agreements, and once it has been uploaded somewhere you have no way to know what happened to it. Most online signing tools send both the document and the signature to a server, because that is how their business works. Here, the PDF is read into your browser's memory, the signature image is drawn onto the page, and the result is written back out, all locally. You can watch your network tab stay silent while it happens.
Drawn or typed, and why the background is transparent
Drawing gives the most natural result and works well on a phone or tablet, where a finger is a better instrument than a mouse. Typing is quicker and produces a clean, consistent mark. Either way the signature is saved as a PNG with a transparent background, so the page shows through behind the ink rather than the signature arriving inside an obvious white rectangle. That single detail is the difference between a signature that looks placed on the document and one that looks pasted over it.
What this is, and what it is not
This places a picture of your signature onto a page, which is what most everyday paperwork asks for — returning a signed form, an offer letter, a rental agreement or a consent letter. It is not a cryptographic digital signature, the kind that embeds a certificate and can prove the document has not been altered since signing. If you have been asked specifically for a digitally signed PDF with a verifiable certificate, you need a certificate-based signing service instead. For the vast majority of requests that say 'sign and send back', a drawn signature is exactly what is wanted.
Frequently asked questions
- Is my document uploaded anywhere?
- No. The PDF is opened and modified entirely inside your browser using pdf-lib, and neither the document nor your signature is ever sent to a server.
- Can I sign on a phone?
- Yes, and it is often easier — you can draw with your finger, which gives a more natural signature than a mouse.
- Is this a legally valid signature?
- For most everyday paperwork an image of your signature is what is being asked for and is widely accepted. It is not a certificate-based digital signature. If you were specifically asked for one of those, you need a certificate-based service.
- Can I sign more than one page?
- One page per pass. Sign a page, download the result, then upload that file again to sign another page.
- Will the signature have a white box around it?
- No. It is saved as a transparent PNG, so the page shows through behind the ink.
- Can I resize or move the signature?
- Click anywhere on the page preview to place it there. To adjust, just click again — the position updates until you apply it.
- Does it work with a password-protected PDF?
- No. Remove the password first, then sign. An encrypted PDF cannot be modified without it, and the tool will tell you rather than fail silently.