Protect PDF
Encrypt a PDF with a password (AES-256) so only people who know it can open it. Encryption happens on your device.
Runs in your browser. Your files are never uploaded or stored.
Something not working, or missing an option?
How to use Protect PDF
- Choose or drop a PDF.
- Type a password twice.
- Select Protect PDF to download the locked copy.
Questions
What if I forget the password?
It can’t be recovered, by us or anyone. Keep it in a password manager.
Are my files uploaded?
No. The tool runs inside your browser, and the page is blocked from sending data anywhere. You can check by turning off your internet connection: it keeps working.
Open-source parts
- qpdf Apache-2.0
More tools: PDF security
Guides: How to password-protect a PDF