Official? Le Benelux support and registration site for RAR and WinRAR RAR and WinRAR are certainly no longer a secret in the world of data management, archiving and compression. RAR and WinRAR are programs that are used to compress files. This means that files will be packed into a smaller file. This compares with an A4 sheet on which a text. If one blank lines and spaces in the text removes the text has been considerably smaller. RAR and WinRAR are 32-bit and 64-bit - multifunction you? Integrated compression and archive management software developed by A. Roshal. See features for a brief overview of the possibilities.