File Extension Search

.r21 File Extension

Developer: Eugene Roshal
File type: WinRAR Split Archive Part 21
You're here because you have a file that has a file extension ending in .r21. Files with the file extension .r21 can only be launched by certain applications. It's possible that .r21 files are data files rather than documents or media, which means they're not meant to be viewed at all.

what is a .r21 file?

The R21 file extension was developed by Eugene Roshal and it is attached to WinRAR Split Archive Part 21 or files that are compressed and belong to the multi-volume compressed .RAR archive parts. These files are the 21st part of the archive that’s been compressed and split in order to fit into multiple discs either for backup purposes or to transfer to another computer, etc. These R21 files are useful when it comes to the reconstruction of original files together with other parts of the split archive. R21 may not be the last part of the split archive files as RAR multi-volume archives could reach up to R99. The number after the letter R in this file extension actually represents the sequence or the part of the split archive. There are a number of archivers that can be used to open R21 files and Whirling Dervishes Alpha ZIP was added to the list as well as Smith Micro StuffIt Deluxe 2011.

how to open a .r21 file?

Launch a .r21 file, or any other file on your PC, by double-clicking it. If your file associations are set up correctly, the application that's meant to open your .r21 file will open it. It's possible you may need to download or purchase the correct application. It's also possible that you have the correct application on your PC, but .r21 files aren't yet associated with it. In this case, when you try to open a .r21 file, you can tell Windows which application is the correct one for that file. From then on, opening a  .r21 file will open the correct application. Click here to fix .r21 file association errors

applications that open a .r21 file

Corel WinZip 16 Pro

Corel WinZip 16 Pro

Compressing files frees up space in the hard disk, and Corel Win Zip 16 Pro can compress files into different formats. This software allows users to choose the level of compression and the compression method that they want to integrate into their files and folders. All Major compressed formats can be extracted by this application, and this compression and decompression software runs in Microsoft Windows XP, Vista And window 7. Internet connectivity is needed for activating this program. Corel WinZip 16 Pro can provide users with access to Zipsend, which is use to compress and send large files through email. This software may also provide users with access to Zipshare, which is use to upload compressed files to various social Websites. Backups are necessary for the important data of the user, and Corel WinZip 16 Pro provides an automated process for backing up files. Users can burn backups directly unto a CD/DVD or Blu-ray disc, or send the compressed files to the user’s email address for virtual backups.
WinRAR

WinRAR

Eugene Roshal developed an application that can create RAR archives called WinRAR. It is a shareware file archiver and data compression utility released by Ron Dwight in 1993, while Alexander Roshal, Eugene Roshal's brother runs the business. WinRAR provides the complete support for RAR, which is WinRAR's original format in compression, ZIP archives, and unpacking of 7z, EXE, ISO, JAR, BZ2, UUE, ACE, GZ, TAR, LZH, ARJ and Z archives. It has multithreaded compression and can create archive with multi-volume and self-extracting. Damaged archives are provided with date redundancy through recovery record and recovery volumes for reconstruction. It also supports in the advancement in file names of Unicode and file system of NTFS. It has also AES (Advanced Encryption Standard) 128-bit key to be used optionally in archive encryption. The software is available in forty seven languages. It is written in C++ and runs with Windows 95, 98, Me, 2000, XP, Vista, 7 Mac OS X, FreeBSD, LInux (Wine required for GUI), and OS/2.
7-Zip

7-Zip

Equipped with a high compression ratio (as high as 7z format via LMZA and LMZA2), 7-Zip is an open-source ZIP archiver software that is usable on any computer regardless of operating system installed from the latest to the earlier versions and without any charge at all. Majority of the source codes used by this program are on the list of GNU LGPL License. These include unRar, RAR,ZIP, ARJ, XZ, Z, TAR, WIM, BZIP2, GZIP, CAB, HFS, LZMA, NSIS, CPIO, RPM, VHD, DEB, CHM, LZH, MBR, FAT, NTFS, XAR, DMG, CramFS, ISO, MSI, SquashFS, and UDF. Technically, formats ZIP and GZIP have a ratio of 2 to 10%, 7z has high ratio from 30 to 70% plus this same format has self extracting capability while both ZIP and 7z has AES 256 encryption. Other features include windows shell, file manager, command line version, FAR manager plug-in and localizations for languages up to 79.

a word of warning

Be careful not to rename the extension on .r21 files, or any other files. This will not change the file type. Only special conversion software can change a file from one file type to another.

what is a file extension?

A file extension is the set of three or four characters at the end of a filename; in this case, .r21. File extensions tell you what type of file it is, and tell Windows what programs can open it. Windows often associates a default program to each file extension, so that when you double-click the file, the program launches automatically. When that program is no longer on your PC, you can sometimes get an error when you try to open the associated file.


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