Document & PDF

Protect PDF

Password protect a PDF online — fast, easy, and 100% free. Lock any document so only people you choose can open it, encrypted locally in your browser so the password is never transmitted anywhere.

Encryption happens on-device
Password never transmitted
No signup or install

Frequently asked questions

How do I put a password on a PDF?

Upload the PDF, set a password, and download the protected file. Anyone opening it afterward will be required to enter that password.

Is it safe to add a PDF password online?

Yes, because the encryption runs locally in your browser, your file and the password you choose are never sent to any server or third party.