WinRAR is a powerful archiver and archive manager that cannot only open all popular compression formats but also features it s own.. RAR files can usually compress content 8 to 15 percent more than ZIP or ARJ files. WinRAR s main features are strong general and multimedia compression, processing of non-RAR archives (ZIP,ARJ,CAB,TAR etc.) long filename support, programmable self-extracting archives (SFX), damaged archive repair, authenticity verification, embedded file comments, and encryption. WinRAR is able to browse and unpack contents of ISO files. WinRAR also supports Joliet extension of ISO9660 and displays long file names inside of Joliet CD images.