How to prevent opening PDF files? 2 methods are recommended!

At work, encryption protection of PDF files is crucial to prevent unauthorized access. PHP editor Xinyi shares two practical methods to encrypt your PDF files to ensure their security and confidentiality. This article will delve into the steps and advantages of these two methods to help you protect your important PDF documents.

Method 1: Set up password protection

We can set an "open password" for the PDF file through the PDF editor, so that the file can only be opened by entering the correct password.

First, after opening the PDF file through the editor, click [Password Encryption] in the menu tab [Protection] list;

After the dialog box pops up, enter the password you want to set in the password field, click [OK], and the setting is completed.

When you open the PDF file again, you will see a prompt bar and you need to enter a password to open the file.

If you no longer need to protect it and do not want to enter a password every time you open the PDF, you can also cancel the password and follow the steps below.

First, open the PDF file through the editor. Because a password is set, you need to enter the password to open the file before operating. Then click [Delete Security Settings] in the [Protection] list of the menu tab to cancel "Open Password".

Of course, if you accidentally forget your password, you cannot cancel it through the PDF editor. In this case, you need to use other tools to solve the problem.

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