Password Protect a PDF Free Online
Add password protection to a PDF locally in your browser. Your file and password never touch a server.
Frequently asked questions
Is the password sent anywhere?
No. Encryption happens locally and only the encrypted output is written to your device, so neither the file nor the password passes through a server, a queue or a log.
Which PDF readers can open the protected file?
The output uses standard PDF encryption, so it opens in the usual desktop and mobile readers and asks for the password once. Keep the password somewhere safe: there is no recovery path and no copy stored here.