How to password-protect a PDF with MobiPDF on Windows

You can easily add a password to a PDF file from the Protect tab. 

Here is how to safeguard your files in four steps:

1. Open your MobiPDF file and click the Protect tab.

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2. Select Password Protect and confirm with OK.

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3. Type your password and choose which restrictions the password will apply. Confirm with OK.

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4. Choose where to save your password-protected file and confirm with Save.


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