The free Sign PDF tool lets you place your signature onto a document. Upload your PDF, add an image of your signature, position it where it belongs, and download the signed file. It saves you the hassle of printing a document, signing it by hand, and scanning it back in. It is free, adds no watermark, and needs no account.
To be clear about what this tool does: it places a visible image of your signature onto the page, the digital equivalent of signing a printout. This covers many everyday cases, such as returning a form or approving a letter. It is not a cryptographic digital signature backed by a certificate, so if you specifically need a certificate-based e-signature with a verified identity and audit trail, that is a different kind of tool.
How to Sign a PDF
- Upload your PDF. Select the file or drag it onto the upload area.
- Add your signature. Upload an image of your signature as a PNG or JPG file.
- Position it. Place the signature where it needs to go on the page, and set its size.
- Download. Save the signed PDF to your device.
Signing Without Printing
The old way to sign a PDF was to print it, sign the paper, and scan it back into a file, which is slow and leaves you with a lower-quality document. Placing a signature image directly onto the PDF skips all of that: you get a clean, signed file in seconds, ready to send back. For many everyday documents, such as forms, letters, agreements, and approvals, a placed signature image is often all that is asked for. Whether a recipient accepts it is their call, so check what yours requires.
What Happens to My File?
Your PDF and signature image are uploaded to our server, where the signature is added. Both uploads are deleted as soon as processing ends, whether it succeeds or fails. The signed file is stored at a random, unguessable address and stays available to download for about two hours, then it is deleted automatically. Anyone who has that link can open it until then. Uploads and downloads use HTTPS.
When to Sign a PDF
- Returning a form. Sign and send back a document without printing it.
- Approving a letter. Add your signature to a letter or memo before sharing.
- Signing an agreement. Place your signature on an everyday agreement or consent form.
- Completing paperwork. Sign a document quickly from any device.
Related PDF Tools
To protect a signed document, lock it with a password. You can also add a watermark or edit existing text before signing.
