QuickiJoin is a lightweight application that has been designed to load quickly and join files that have been split as fast as possible, with no defragmentation. Files can be dropped into the main window, on the application icon, specified via the command-line, or using the file browser within the application itself.

QuickiJoin can also detect if a split file has been split with WinRAR or 7-Zip, and can automatically join that file using the respective application if it is installed.