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ARJ Compressed archive
File type: Archive and compressed file
Files with arj file extension are compressed archives created with ARJ archiver. These were very common in the past, later replaced by RAR and ZIP programs.
File type category:
Archive and compressed file
Date updated: July 25, 2025
The arj file extension is used for the native archive format of the ARJ archiver program, a tool for creating compressed file archives. Robert K. Jung invented it. ARJ stands for Archived by Robert Jung.
ARJ compresses files into a disk space-saving archive. It is fast, reliable, and features a rich set of capabilities, including support for Windows 9x, Millennium long file names, file version management, data damage protection, an ANSI escape sequence display handler, configurable command options, multiple volume archives (archives that span diskettes), and more.
MIME types:
application/arj
application/x-compress
application/x-compressed
application/zip
application/x-winzip
application/x-tar
application/x-gzip
application/x-stuffit, zz-application
Use ARJ to open *.arj archive files. However, it will be much more easier if you use any of the modern archiver programs, such as WinRAR or WinZip, which should be able to open the *.arj files.
The simple way, how to convert *.arj files to another compression or archive file format is to use ARJ or other archiver programs to decompress ARJ archive. The extracted files can be then compressed by some another compression utility to your chosen archive or compression file format.
Software applications that can open arj files:
Apple macOS / Mac OS X
Linux/Unix
Google Android
Microsoft MS-DOS
Programs for viewing arj files:
Microsoft Windows
Software apps that convert arj files:
Microsoft Windows
Software apps that extract arj files:
Apple macOS / Mac OS X
Linux/Unix
Google Android
Microsoft MS-DOS
Software applications that handle other tasks involving arj files:
Apple macOS / Mac OS X
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