Protect PDF with a password
Add a password to a PDF with AES-256 encryption, and optionally block printing, copying or editing.
How to protect PDF with a password
- Drop the PDF you want to protect.
- Type a password twice. Optionally restrict printing, copying or editing.
- Click Protect PDF and keep your password somewhere safe.
Frequently asked questions
How secure is it?
The PDF is encrypted with AES-256, the strongest standard PDF encryption. A long, unique password matters most.
What if I forget the password?
It can’t be recovered, by us or anyone else. Store it in a password manager.
Do restrictions on printing and copying always work?
Most PDF readers respect them, but they are not encryption. Some apps ignore them, so use a password to open for real privacy.
Is my file uploaded?
No. Encryption runs in your browser with qpdf, and nothing is sent to a server.
Related tools
Everything runs in your browser. Your files and text are never uploaded.