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.

Files you choose stay on your device — they are not uploaded to Tools99.

Workspace: 1. Add files2. Ready3. Working4. Done — download

How this workspace works

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.

Choose a PDF — or drop files here

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

Your file never left this device, so there is no server copy to delete. Download again, start over, or continue with a related tool below.

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.