PDF tools

Protect PDF (add password)

Password-protect a PDF with real PDF encryption, so it asks for the password before it opens. Your file is processed in your browser and is never uploaded.

Choose a PDF — or drop files here

Password Confirm password Owner password (optional, defaults to the same password)

How to use Protect PDF (add password)

Choose a PDF file.
Set the password you want it to ask for.
Download the protected file and test it opens only with that password.

A good use for this

Adding a password gate to a sensitive PDF before emailing or sharing it.

Limits

This is real PDF encryption in your browser, but a password is only as strong as you make it — a short, guessable password will not protect much, and a forgotten password cannot be recovered by this tool.