Protect PDF
Put a password on a PDF so only people who have it can open the file.
Drop a PDF here
Everything happens on your device — your files are never uploaded.
Advanced options
Lets you keep full control of the file separately from the open password and the permissions below.
Permissions are advisory. Most viewers honor them, but they're not a guarantee. The open password is the real protection.
Set a password. Anyone opening the PDF will need it, and everything happens on your device.
Done
How it works
- 1 Drop your PDF or pick it.
- 2 Pick a password and confirm it (set permissions under Advanced if you like).
- 3 Click Protect PDF and download the encrypted file.
Built with open source
- pdf-lib (Cantoo fork) — A pdf-lib fork. It adds PDF password encryption and decryption. · MIT
Frequently asked
Is the PDF really encrypted, or just hidden? +
Really encrypted. Your password scrambles the file's contents using the PDF standard's own encryption, so no compliant viewer can open it without the password.
Does my file get uploaded to a server? +
No. Encryption runs in your browser, on your device. The PDF and your password never leave your computer.
What's the owner password and the permission checkboxes for? +
The owner password gives full control separate from the open password, and the checkboxes ask viewers to allow or block printing, copying, and editing. Those flags are advisory: most readers respect them, but they aren't a hard guarantee. The open password is the real lock.