What is the .rar File Extension?
.rar is a file extension associated with WinRAR archives, i.e. zipped folders in a special format created by WinRAR.
How to Open .rar Files?
.rar files can be natively on Windows 11's file manager (the File Explorer). In previous versions of Windows, this wasn't possible, so either WinRAR or an archiver with .rar support such 7-Zip has to be installed.