R21 File - opening and understanding

Did your computer fail to open a R21 file? We explain what they are used for and recommend software that we know can open or otherwise handle your .R21 files.

What is a R21 file?

The R21 file extension indicates to your device which app can open the file. However, different programs may use the R21 file type for different types of data.

While we do not yet describe the R21 file format and its common uses, we do know which programs are known to open these files, as we receive dozens of suggestions from users like yourself every day about specific file types and which programs they use to open them.

We are continually working on adding more file type descriptions to the site, so if you have information about R21 files that you think will help others, please use the Update Info link below to submit it to us - we'd love to hear from you!

How to open R21 files

You will need a program compatible with the specific file you are trying to open, as different programs may use files with file extension R21 for different purposes.

While we have not verified the apps ourselves yet, our users have suggested 30 different R21 openers which you will find listed below.

Various viewers for this file format

These apps are known to open certain types of R21 files. Remember, different programs may use R21 files for different purposes, so you may need to try out a few of them to be able to open your specific file.

WinRARWinRARUser submitted
WavePad Sound EditorWavePad Sound EditorUser submitted
Switch Sound File ConverterSwitch Sound File ConverterUser submitted
Pixillion Image ConverterPixillion Image ConverterUser submitted
Express ZipExpress ZipUser submitted
Zulu DJ SoftwareZulu DJ SoftwareUser submitted
SoundTap Streaming Audio RecorderSoundTap Streaming Audio RecorderUser submitted
PowerArchiverPowerArchiverUser submitted
7-Zip7-ZipUser submitted
BandizipBandizipUser submitted
VideoPad Video EditorVideoPad Video EditorUser submitted
Express BurnExpress BurnUser submitted
iTunesiTunesUser submitted
WinCDEmuWinCDEmuUser submitted
360360User submitted
Prism Video File ConverterPrism Video File ConverterUser submitted
PhotoStage Slideshow ProducerPhotoStage Slideshow ProducerUser submitted
uTorrentuTorrentUser submitted
MixPadMixPadUser submitted
RealPlayerRealPlayerUser submitted
Doxillion Document ConverterDoxillion Document ConverterUser submitted
ExplzhExplzhUser submitted
KeyBlaze Typing TutorKeyBlaze Typing TutorUser submitted
Express Zip File Compression SoftwareExpress Zip File Compression SoftwareUser submitted
LhacaLhacaUser submitted
PhotoPad Image EditorPhotoPad Image EditorUser submitted
LhazLhazUser submitted
B1 Free ArchiverB1 Free ArchiverUser submitted
Express InvoiceExpress InvoiceUser submitted
PeaZipPeaZipUser submitted

Try a universal file viewer

Try a universal file viewer like Free File Viewer. It can open over 200 different types of files - and most likely yours too. Download Free File Viewer here.

We have not yet verified any programs for Mac that work with this specific file format. If you know one, please use the 'Suggest a program' link below. Thanks!
We have not yet verified any web services that work with this specific file format. If you know one, please use the 'Suggest a program' link below. Thanks!