Appnimi PDF Locker

Appnimi PDF Locker is a lightweight Windows application that features encrypting capabilities for helping you secure your PDF files with passwords, so they cannot be accessed by unauthorized users.

Simple looks

You are welcomed by a clean feature lineup that allows you to switch between two modes: single file or batch processing. The last option proves to be particularly useful, as it helps you add multiple PDF files and process them at the same time.
There is no support for drag-and-drop operations, so you can only rely on the built-in browse function.

Main features

Appnimi PDF Locker gives you the possibility to add the PDF file that you want to secure and enter the owner and user passwords. On the downside, you cannot hide the characters from your passwords behind asterisks, so make sure no one can see your passwords while you are typing them.
For the batch processing mode, you are required to specify the folder that contains the PDFs that you want to password-protect them simultaneously. Since it doesn’t require much computer knowledge to work with this small tool, even less experienced users can master the entire process in no time.
During our testing we have noticed that Appnimi PDF Locker carries out an operation very quickly. As it would be expected from such a small utility, it remains light on system resources, so it doesn’t hamper computer performance, nor interfere with other programs’ functionality.

Bottom line

To sum things up, Appnimi PDF Locker offers a simple software solution when it comes to helping you secure your PDF files by setting up passwords.