**You can add passwords with manual methods like WPS Office and Adobe Acrobat. But there is one problem with using WPS Office it takes very much time to lock PDF Files in Bulk because it can apply passwords or restrictions only on one PDF file at one time. Also, Adobe Acrobat is not good for every user, because you have to take a subscription to Adobe to take the facilities. So, you need a trusted Automated tool that can save you time and money. According to these scenarios, there is only one method which is given by the technical experts of SysTools.They created a PDF Lock Software that can help users properly. Also, it is free to use in the demo version.

Steps to use this automated third party tool.

Step 1. Download the software and launch it.

Step 2. Add PDF files or folders to make them restricted or protected.

Step 3. Click the Next button and apply the password according to the requirement.

Step 4. Select the Encryption Type and Click on the Lock button.

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