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How do I password-protect a PDF?

Updated July 2026

Protecting a PDF encrypts it with a password, so only people with the password can open the file — the encryption travels with the document. In Arthize you open the protect tool, then add your pdf, then set a password, then download, and download the result — free, with no watermark.

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Answer

Protecting a PDF encrypts it with a password, so only people with the password can open the file — the encryption travels with the document. In Arthize you open the protect tool, then add your pdf, then set a password, then download, and download the result — free, with no watermark.

More about password protect pdf

Password protection encrypts the PDF so it can't be opened without the password.

The encryption travels with the file, unlike a folder lock that stays on your computer.

A separate permissions password can restrict printing or copying.

How to password-protect a PDF

  1. 1

    Open the protect tool

    Sign in and open the Protect tool.

  2. 2

    Add your PDF

    Upload the document you want to encrypt.

  3. 3

    Set a password

    Choose a strong open password and, optionally, a permissions password.

  4. 4

    Download

    Get an encrypted PDF that requires the password to open.

Common questions

How do I password-protect a PDF?
Protecting a PDF encrypts it with a password, so only people with the password can open the file — the encryption travels with the document. On Arthize it's free with no watermark and processed privately.
Is a password-protected PDF actually encrypted?
Protecting a PDF encrypts it with a password, so only people with the password can open the file — the encryption travels with the document. On Arthize it's free with no watermark and processed privately.
Can I stop people printing or copying my PDF?
Protecting a PDF encrypts it with a password, so only people with the password can open the file — the encryption travels with the document. On Arthize it's free with no watermark and processed privately.

Related

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