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.

There is one other file type using
the R21 file extension!

r21 file icon.r21 - Norton Ghost rar file

Detailed description

Software that works with r21 file extension

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R21 file extension - Split Multi-volume RAR compressed file archive (part 23)

What is r21 file? How to open r21 files?

File type specification:

Archive and compressed file type icon Archive and compressed file type

r21 file icon: r21 filetype icon

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:

  • .rar or exe (SFX) for first volume
  • .r01, r02, r03 ....etc. for any additional volumes


  • .rar or exe (SFX) for first volume
  • .001, .002, .003 ....etc. for any additional volumes

The newer versions of WinRAR are using:

  • .rar or exe (SFX) for first volume
  • .part1.rar, .part2.rar, part3.rar ....etc. for any additional volumes

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 default software associated to r21 file type:

WinRAR icon

win.rar GmbH logo WinRAR  Microsoft Windows software

Company or developer:
  win.rar GmbH

WinRAR is a popular file compression and archive utility. Along with WinZip and 7-Zip is one of the most common compression programs for Windows. Its native format is as the name implies RAR and uses rar file extension.

WinRAR is a powerful archive manager. It can backup your data and reduce the size of email attachments, decompress RAR, ZIP and other files downloaded from Internet and create new archives in RAR and ZIP file format.

WinRAR is also able to unpack CAB, ARJ, LZH, TAR, GZ, ACE, UUE, BZ2, JAR, ISO, 7Z, Z archives. It consistently makes smaller archives than the competition, saving disk space and transmission costs. WinRAR offers a graphic interactive interface utilizing mouse and menus as well as the command line interface.

Help how to open R21 files:

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.

How to convert file with extension R21:

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.

List of software applications associated to the .r21 file extension

Recommended software programs are sorted by OS platform (Windows, Mac OS X etc.) and possible program actions
that can be done with the file
: like open r21 file, edit r21 file, convert r21 file, view r21 file, play r21 file etc. (if exist software for corresponding action in's database).

Click on the tab below to simply browse between the application actions, to quickly get a list of recommended software, which is able to perform the specified software action, such as opening, editing or converting of the r21 files.

  • Open r21 file
  • Create r21 file
  • Extract r21 file

Software that open r21 file - Split Multi-volume RAR compressed file archive (part 23)

Click on the link to get more information about listed programs for open r21 file action.

Microsoft Windows:

Apple macOS / Mac OS X:

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