PDF Tower

Password-protect a PDF

Add a password so only people who have it can open the PDF.

Runs on your device. Your file is not uploaded.

Free to open and preview. Downloading the result needs PDF Tower: $89.99 a year or $12.49 a month. See pricing

What it does

PDF Tower encrypts the PDF with AES-256 on your device. Anyone opening the saved copy needs the password you choose.

How it works

  1. Choose a PDF.
  2. Type a password twice.
  3. Download the protected PDF with a PDF Tower plan.

Good to know

  • Keep the password somewhere safe. Nobody, including PDF Tower, can recover it.
  • Send the password separately from the file, for example by text message.
  • Included in every plan, from $89.99 a year. Compare plans
  • Your file is opened and processed in this browser tab. How on-device processing works