Some time ago i needed to convert a large number of rar archives to 7z but unfortunately 7-Zip doesn’t have convert archive feature. So, I’ve made a little AutoIT script that finds specified arhives and runs 7zG.exe commands to extract and compress them again into given format. At some point i added GUI for ease of use and this is the result:
Bulk 7-Zip Converter is written in AutoIT and requires 7-Zip for operation. Released under GNU LGPL license.
Currently it doesn’t support explorer integration, but I may add it at some point in time.