It is the default app to create a RAR archive file or open a RAR file on Windows 10. How to Open RAR Files with WinRAR on Windows 10Īctually, RAR file is the default file format of an archive program named WinRAR. In Windows 10, there are some applications that can open RAR files, among which WinRAR, WinZip, 7-Zip are the most commonly used ones. Read More How to Open RAR Files on Windows 10 for Free