Protect PDF
Password-protect a PDF with strong encryption so it can only be opened with the password. Runs entirely in your browser using deterministic PDF encryption; your file and password are never uploaded.
Runs in your browserDrop files, paste, or click to browse
Files are processed in your browser — they never leave your device.
Add a file to continue.
How to protect pdf
Password-protect a PDF with strong encryption so it can only be opened with the password. Runs entirely in your browser using deterministic PDF encryption; your file and password are never uploaded. To use Protect 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.
Frequently asked questions
- Is Protect PDF free to use?
- Yes. Protect 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. Protect PDF processes your file directly in your browser, so it is never uploaded to any server.
- Do I need to install anything?
- No. Protect PDF works in any modern web browser on Windows, Mac, Linux, iPhone and Android — nothing to install.