18Docs

Sign PDF

Add your signature to a PDF, or place initials, dates and text fields.

Runs in your browser
100% private: this tool runs entirely in your browser. Your file never leaves your device — nothing is uploaded, nothing is stored.

Drop a PDF here or click to browse

Runs in your browser — your file is never uploaded.

How to sign pdf

Add your signature to a PDF, or place initials, dates and text fields. To use Sign PDF: 1) add your file by dragging them in or clicking to browse, 2) set your security options, 3) download your result — done in seconds. It's free, needs no signup, and most tools run right in your browser so your files never leave your device.

Popular ways to use sign pdf

Frequently asked questions

Is Sign PDF free to use?
Yes. Sign PDF is free to use. It's free, needs no signup, and most tools run right in your browser so your files never leave your device.
Are my files safe and private?
Completely. Sign PDF processes your file directly in your browser, so it is never uploaded to any server.
Do I need to install anything?
No. Sign PDF works in any modern web browser on Windows, Mac, Linux, iPhone and Android — nothing to install.

More PDF Security tools

Related guides