# How do I password-protect a PDF?

_Updated July 2026 · Arthize · https://arthize.com/answers/how-to-protect-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. 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.

## 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. **Open the protect tool** — Sign in and open the Protect tool.
2. **Add your PDF** — Upload the document you want to encrypt.
3. **Set a password** — Choose a strong open password and, optionally, a permissions password.
4. **Download** — Get an encrypted PDF that requires the password to open.

## FAQ

### 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.