7-Zip : A free, open-source alternative that handles RAR files.

If you can tell me or what device you are trying to modify, I can give you more specific instructions on how to use it safely. How to open and extract rar files on Windows 10 pc?

PeaZip : Another open-source option that can also convert RAR files to other formats like ZIP.

: Files like these are often shared on XDA Developers as part of a larger toolkit or a specific version of a utility.