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Password Protect PDF

Encrypt a PDF with AES-256 in your browser.

Set a user password (required to open). Owner password is optional and defaults to the user password.

Encryption uses AES-256 in your browser (MIT-licensed library). Keep a copy of your password — MiniFyPNG cannot recover it.

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Upload a PDF to preview

Passwords

What does password protect PDF do?

The PDF is encrypted so opening it requires the user password.

How to password-protect a PDF

  1. 1

    Upload a PDF

    Choose the PDF to encrypt. Encryption runs in your browser.

  2. 2

    Set passwords

    Enter a user password (open) and optionally an owner password (permissions).

  3. 3

    Download the encrypted PDF

    Save the protected file. MiniFyPNG does not store passwords.

Protect PDF FAQ

Which encryption is used?

Standard PDF encryption via a MIT-licensed pdf-lib fork with encrypt support.

Forgot password?

We cannot recover it. Keep a copy of the unprotected original.

Uploaded?

No. Passwords never leave your device for this tool.

Related tools?

Unlock PDF removes encryption when you know the password.

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