As its name suggests, RAR Unlocker is a simple tool to lock and unlock your RAR files. For those who do not know, .RAR format (with ZIP) is the most used compression format. Therofore, this tool allows you to lock and unlock these types of files. Moreover, RAR Unlocker also permits you to view the file attributes of your RAR archives. It is a freeware and it's compatible with all Windows versions.