Protect PDF with a password
Add an open password to a PDF with AES-256 encryption — in your browser. Free, no sign-up, works on desktop and mobile.
🔒 Your files never leave your device — everything is processed in your browser, and the file is not uploaded to any server.
How to use
- Choose a PDF.
- Type the password and confirm it.
- Press Start and download the protected file.
FAQ
Is my file uploaded?
No. Everything is processed in your browser on your device; the file is never sent to a server.
Is it free?
Yes, completely free with no sign-up.