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Details of extension .arj

On this page, we're going to take a closer look at the .arj file extension, which is related to ARJ Compressed Archive. We'll explain what exactly a .arj fileformat is and how you can use it. If you're interested in learning more details about this type of file, we'll show you where to find them. And if you ever need to convert .arj files into different formats, we'll give you some tips on how to do that too. Let's see the file format associated with this file extension!


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arj file - ARJ Compressed Archive

ARJ Compressed Archive

The ARJ file is an ARJ Compressed Archive. It is the native format of ARJ (dos) and WinARJ archiver. Like other archives, ARJ files are data containers, they store one or several files in the compressed form.
Category: Archive files
Application: WinARJ
Program name: WinARJ.exe
Mime-type: application/x-arj-compressed
Magic bytes (HEX): -
Magic string (ASCII): -
a00, a01, a02, a03, a04, a05, a06, a07, a08, a09, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20, a21, a22, a23, a24
Related extensions:
.sit5 StuffIt 5 Archive
.tz Compressed Tape Archive
.tgz Unix Gzipped TAR Archive
.zx01 WinZIP Splitted ZIPX Archive

The .arj file extension might not only belong to a single type of file, there could be various kinds that use it. Keep in mind that files with the .arj extension may contain various content types. If you have helpful information about this extension, write to us!

Could someone have spelled the .arj file extension wrong?

In our database, we came across the following similar extensions:

.adj LISCAD Adjustment Control Data
.arn CD Autorun Creator Package
.ark PowerDesk Pro Archive
.ary SmartStart Array Configuration Script
.ar Unix Static Library
.aj AspectJ Source Code

The .arj extension is frequently misused

People sometimes confuse the .arj filename extension. Based on the searches on our site, here are the most common misspellings from the past year.

adj (1), arn (1), ark (1), ary (1), aru (1), ar (1), aj (1), arm (1), arh (1), ari (1)

Having trouble opening a .arj file?

If you want to open a .arj file on your computer, you just need to have the appropriate program installed. Incorrect settings for the .arj association can trigger this error.

Windows can't open this file:

File: example.arj

To open this file, Windows needs to know what program you want to use to open it. Windows can go online to look it up automatically, or you can manually select from a list of programs that are installed on your computer.

To change file associations:

  • Right-click a file with the extension whose association you want to change, and then click Open With.
  • In the Open With dialog box, click the program whith which you want the file to open, or click Browse to locate the program that you want.
  • Select the Always use the selected program to open this kind of file check box.

Supported operating systems

Windows Server 2016/2019/2022, Windows 7, Windows 8, Windows 10, Windows 11, Linux, Mac OS X, macOS, iOS, Android