The xr21 file extension is related to the xrecode and used for its data files.
Software that open xr21 file
XR21 file extension - xrecode file
What is xr21 file? How to open xr21 files?
File type specification:
The xr21 file extension is associated with the xrecode a software tool for Microsoft Windows operating system that allows users to grab audio data and convert audio formats.
The xr21 file stores some kind of data used by xrecode.
The default software associated to open xr21 file:
xrecode is easy-to-use audio converter and audio grabber for Microsoft Windows. It is able to convert audio formats such as MP3, MP4, WMA, FLAC, ALAC, AAC, APE, OGG, M4A, 3GP, WAV, Shorten etc.
List of recommended software applications associated to the .xr21 file extension
Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open xr21 file, edit xr21 file, convert xr21 file, view xr21 file, play xr21 file etc. (if exist software for corresponding action in File-Extensions.org's database).
Unspecified and all other actions for computer programs working with xr21 file - xrecode file
Click on the software link for more information about xrecode. xrecode uses xr21 file type for its internal purposes and/or also by different way than common edit or open file actions (eg. to install/execute/support an application itself, to store application or user data, configure program etc.).