Security

Password-protect a PDF

Encrypt a PDF with a password so only you can open it.

Open in editor →Free · no sign-up · nothing uploaded

Lock a sensitive document so it needs a password to open. The file is encrypted with AES right on your device — the password never travels anywhere.

Anyone you share it with will need the password to view it in any PDF reader.

How to protect pdf

  1. 1Open the PDF in the editor.
  2. 2Open the Tools panel → “Protect with password”.
  3. 3Enter and confirm a password.
  4. 4Download the encrypted PDF.

Why use pidief

  • ✓ AES encryption
  • ✓ Password required to open
  • ✓ Encrypted on your device
  • ✓ Everything runs in your browser — your file is never uploaded to a server.

Password-protect a PDF now — free

Runs in your browser. No upload, no login, no watermark.

Open in editor →

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