Join (Merge, Combine) Multiple RAR Files Into One helps you to keep your RAR library organized. It allows you to create a new RAR file by putting together the files contained in any number of existing RAR archives. Its simple yet effective interface allows you to select the input files to merge either one by one or by loading all the RAR files contained in a folder and its subfolders.
Unlike some other RAR tools which allow you to nest a RAR file into another, or force you to uncompress the RAR files before creating a new one with all the resulting files, this effective tool from Sobolsoft simply merges existing RAR files into a new, compressed RAR file, without uncompressing anything, or nesting files, and thus making it easier for you to find a specific file within a RAR container. The new resulting file will contain all those files previously included in the original containers, and following the order in which their respective files were when the merging process started.
The process itself runs reasonably fast, and to make things easier, you can combine entire folders and subfolders of RAR files by uploading all of them in one go and clicking on the “Join” button. However, the complete lack of options to customize the output will not allow you to set the level of compression you need, which may be more than desirable when merging multiple files, thus allowing you to reduce the size of a presumable big output RAR file.