ARJ archives were actively used in past, but nowadays are not that common. You may still find old .arj files are transform them to other compressed formats, including RAR, ZIP or similar. You can do that in any file manager that still supports ARJ format and also supports newer formats, some good and reliable choices are listed below.
Convert ARJ Compressed archive to WinRAR RAR compressed archive.
We found 5 software records in the database related to .arj to .rar file format conversion.
Microsoft Windows software - convert arj to rar on Windows
One of the oldest and most popular shareware file archiver and data compression utility
Convert from arj file format
|Yes, WinRAR supports rar file conversion as a target file type.||Yes||Yes||rar editor||Yes||No||No||Yes|
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned arj to rar. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
Popular open source file archiver with a high compression ratio
One of the many available file compression utilities
Freeware file compression tool
Apple macOS / Mac OS X software - convert arj to rar on OS X
A compression utility for Mac