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Encrypt PDF

Free · no watermark · files stay on your device

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About this tool

Password-protect a PDF so it cannot be opened without the password. Encryption runs locally — we never see the file or password.

How to use Encrypt PDF

  1. 1Open an unlocked PDF.
  2. 2Set a password you will remember.
  3. 3Encrypt and download the protected file.

You need

  • An unlocked PDF
  • A password you will remember

Honest limits

  • Uses standard PDF encryption locally.
  • If the file is already encrypted, unlock it first, then encrypt again.