Protect PDF

Add a password so only people with it can open your PDF. Processed securely on our server and auto-deleted right after. A few free uses a day — no login needed.

About Protect PDF

Applies AES-256 encryption — the same standard used by banks — so the PDF cannot be opened without the password you set. Your file is sent over an encrypted connection, processed in memory, and never stored. To remove a password you already know, use Unlock PDF.