What is Protect PDF?
Add a password so only you can open your PDF. This free online tool runs in your browser, so you do not need to install software or create an account.
How to use the Protect PDF tool
- Upload your PDF
- Choose a password
- Download the protected PDF
Why use our Protect PDF tool?
- Completely free, with no watermark and no signup
- Your files stay on your device and are never uploaded
- Works on mobile, tablet and computer
Frequently asked questions
Is it safe to use?
Yes. Your file is processed inside your own browser and is not sent to our server.
Is there a file size limit?
For stable performance on phones, files up to 100 MB are supported.
Do I need to create an account?
No. You can use the tool as many times as you like without signing up.