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Split Multi-volume RAR compressed file archive (part 23)
File type: Archive and compressed file
Files with r21 extension are mainly RAR archives, or rather it is one part of a big RAR archive. You will need all the parts in order to extract the data.
Found 2 different file type records with the same r21 filename suffix.
File type category:
Archive and compressed file
Date updated: July 19, 2025
The r21 file extension is associated with WinRAR. Its one part of a multi-volume compressed RAR archive.
Some RAR files can be parts of a multi-volume sequences. In WinRAR you can split a huge archive to a few smaller files, which are called volumes.
Older versions of WinRAR used either:
Or:
The newer versions of WinRAR are using:
In order to unpack the multi-volume RAR archive, you need to place ALL of the split parts in the same directory and start extraction of the first volume. The program will automatically use all of the parts to extract the content of the archive.
The *.r21 file is only one part of RAR multi-volume archive. If you want to extract this file, you must have all parts of the RAR multi-volume archive. Open the first part of RAR (*.rar file) multi-volume archive in WinRAR application and extract files from RAR multi-volume archive.
It is not possible to convert only one part of RAR multi-volume archive. Only complete RAR archive can be converted in to another archive or compression format. The easiest way how to convert complete RAR multi-volume archive is to decompress the RAR archive with the use of WinRAR and repack the content with another compression or archive application of your choice.
Software applications that can open r21 files:
Apple macOS / Mac OS X
Linux/Unix
Software apps that create r21 files:
Software apps that extract r21 files:
Apple macOS / Mac OS X
Linux/Unix
File type category:
Backup file
Date updated: October 20, 2017
The r21 file extension is used by Norton Ghost. Backup file in RAR compression format. The .r21 file extension is most often used by WinRAR for split archive file. This file format is described at this rar
Software apps that backup r21 files:
Microsoft Windows
Software applications that handle other tasks involving r21 files:
Microsoft Windows
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