Are my files uploaded anywhere?

No. This tool runs entirely in your browser, so your file is processed on your own device and never leaves it. You can even use it offline.

Is this a legal digital signature?

It stamps a visible image of your signature, which is fine for most documents. Certificate-based cryptographic signing is a separate, more advanced option.

Yes, completely free, with no account and no sign-up.

Sign PDF

Add your signature to a PDF — draw it with your mouse/finger or upload a photo of it.

Runs on the server

Note: Stamps a visible image of your signature onto the page. Cryptographic signing (using a digital certificate file) is a separate, more advanced option.

Drop a PDF file here, or click to choose

.pdf · up to 100.0 MB

How to use Sign PDF

1Drop in your PDF.
2Draw your signature with the mouse or finger, or upload a photo of it.
3Place it on the page and download.

Read the full guide: How to sign a PDF →

Frequently asked questions

Are my files uploaded anywhere?: No. This tool runs entirely in your browser, so your file is processed on your own device and never leaves it. You can even use it offline.
Is this a legal digital signature?: It stamps a visible image of your signature, which is fine for most documents. Certificate-based cryptographic signing is a separate, more advanced option.
Is it free?: Yes, completely free, with no account and no sign-up.