ARJ


ARJ is a software tool designed by Robert K. Jung for creating high-efficiency compressed file archives. ARJ is currently on version 2.86 for DOS and 3.20 for Microsoft Windows and supports 16-bit, 32-bit and 64-bit Intel architectures.
ARJ was one of two mainstream archivers for DOS and Windows during the early and mid-1990s, with PKZIP being its competition. Parts of ARJ were covered by . Generally ARJ was less popular than PKZIP, but it did have a niche market during the BBS era and in the warez scene. This was largely due to ARJ's creation and handling of multi-volume archives being more robust than that of PKZIP.

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, Zipeg, and WinRAR can also unpack.arj files. For macOS, standalone utilities, such as DeArj and UnArjMac, are available.