Skip to content
ChargeBiteTools

Guide · PDF

How to password-protect a PDF with AES

A password stops casual opening. It is not DRM. ChargeBite encrypts with pikepdf, returns the locked file, and deletes the upload and the password.

Updated 2026-09-08

Jump to the tool

Skip the article and start in seconds — free, no account.

Protect PDF →

Step-by-step

  1. Open Protect PDF.
  2. Upload an unlocked PDF. If it is already locked, unlock it first.
  3. Enter and confirm a password. Leave “restrict editing” on unless you only want an open password.
  4. Download. Share the password out of band — we cannot recover it later.

FAQ

What encryption is used?

AES via pikepdf. Pages are not flattened.

Can you recover a forgotten password?

No. We do not store it.