ARJ

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Archived by Robert Jung
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Filename extensionTemplate:Monodiv
Uniform Type Identifier (UTI)public.archive.arj
Developed byRobert K. Jung
Initial release1991; 35 years ago (1991)
Latest release
2.90 (MS-DOS), 3.31 (Windows)[1]
November 3, 2025; 9 months ago (2025-11-03)[1]
Type of formatarchive format
Open format?Yes (patent expired)
Websitearj32.com

ARJ (Archived by Robert Jung) is a software tool designed in 1991 by Robert K. Jung for creating high-efficiency compressed file archives. ARJ is currently on version 2.90 for MS-DOS and 3.31 for Microsoft Windows and supports 16-bit, 32-bit and 64-bit Intel architectures.[1]

ARJ was one of many file compression utilities for MS-DOS and Microsoft Windows during the early and mid-1990s. Parts of ARJ were covered by U.S. patent 5140321 (expired). ARJ is well-documented and includes over 150 command line switches.

File format support in other software

ARJ archives can be unpacked with various tools other than the ARJ software. There exists a free software re-implementation of the tool. A number of software utilities, including 7-Zip, Total Commander, Zipeg, and WinRAR can also unpack .arj files.[2] For macOS, standalone utilities, such as DeArj and UnArjMac, are available.

See also

References

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  1. ^ a b c Page Module:Citation/CS1/styles.css has no content."ARJ Software". 2025-11-16. Retrieved 2025-11-16.
  2. ^ Page Module:Citation/CS1/styles.css has no content."File Type: ARJ Compressed File Archive". Archived from the original on 2016-03-04. Retrieved 2019-04-08.

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