Password Protect PDF — Encrypt a Document

Password protection encrypts the contents of a PDF so it cannot be opened, copied, or modified without the password. Because encryption happens on your device, your unprotected file and your password are never transmitted anywhere.

How to encrypt pdf in your browser

  1. 1Add the PDF you want to secure.
  2. 2Enter the password you want to require. Choose something you will not lose — it cannot be recovered.
  3. 3Click Encrypt PDF and download the protected file.

Frequently Asked Questions

What happens if I forget the password?

The file cannot be opened. Encryption is applied on your device and nothing about the password is stored or transmitted, so there is no reset and no recovery path. Keep a copy of the original unprotected file somewhere safe.

What can someone do with the file without the password?

Nothing. The document cannot be opened, and printing, copying, and editing are all blocked by the permissions applied alongside the password.

Is my password sent to your servers?

No. Both the file and the password stay in your browser for the whole process — nothing about either is transmitted.