Protect PDF with a Password — AES-256
Encrypt PDFs so they need a password to open, and restrict printing, copying or editing. The password never leaves this tab.
Help shape Protect PDF with a Password — AES-256
The bug you just noticed will fade in 3 minutes. The feature idea will vanish after your next tab switch. Crazy peps don't suffer silently.
Frequently Asked Questions
Drop one or more PDFs, type a password twice (or generate a strong one), choose what people may do with the file, then press Protect. Every file is encrypted with AES-256.
It uses AES-256 (PDF 2.0 security handler, revision 6), the strongest standard PDF encryption, supported by Acrobat, Chrome, Edge, Firefox and macOS Preview. A long, random password is what makes it hard to break.
Mainstream viewers honour them, but they're permissions, not DRM — determined users with special software can ignore them. The open password itself, however, is real encryption.
No. Encryption runs in your browser. We never see your file or your password, which also means we can't recover it if you forget it.