ARJ

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This article is about the compressed file format. For other uses, see ARJ (disambiguation).
Archived by Robert Jung
File:ARJ v2.50 command options 01.png
Filename extension
.arj
Internet media type{{#property:P1163}}
Uniform Type Identifier (UTI)public.archive.arj
Developed byRobert K. Jung
Initial release1991; 35 years ago (1991)
Latest release
2.86 (MS-DOS), 3.31 (Windows)[1]
November 3, 2025; 8 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 2.86 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 5,140,321 (expired). ARJ is well-documented and includes over 150 command line switches.

File format support in other software

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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

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References

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  1. ^ a b c Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  2. ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
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