The RAR file extension is used with the native format of the WinRAR file archiver.
Files in the RAR file extension contain data that are stored in one or more compressed files. If you have downloaded a file in the .rar file extension from the Internet, the contents need to be unpacked for it to be used.
The RAR file extension was created by Eugene Roshal, and is a patented format for archive files licensed by WinRAR GmbH.
Files in the RAR file extension has support for error recovery, data compression, as well as file spanning.
The WinRAR application has full support for files in the .rar file extension. This program is used to unpack and create files in the .rar file extension. If WinRAR is installed in your computer, a downloaded file in the .rar file extension can be double clicked, and WinRAR will automatically extract the selected file.
Some files with the .rar file extension can have portions of multivolume sequences. WinRAR can be used to split large archives to less smaller files known as volumes.
It may have the RAR file extension (as the first volume), and the succeeding volume can have file extensions in, .r01 or .part1.rar, part2.rar, etc.
If volumes need to be unpacked, they can all be placed in the same folder, and extraction can be started in the first volume.