ARJ file extension
The table below provides useful information about the .arj file extension. It answers questions such as:
- What is the .arj file?
- What program do I need to open a .arj file?
- How can the .arj file be opened, edited or printed?
- How can I convert .arj files to another format?
Table of Contents
- ✅ ARJ Compressed Archive
- 🔄 .arj file converters
- 🚫 .arj file related errors
We hope you find this page helpful and a valuable resource!
1 extension(s) and 0 alias(es) found in database
✅ 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.
Other types of files may also use the .arj file extension.
🚫 The .arj file extension is often given incorrectly!
According to the searches on our site, these misspellings were the most common in the past year:
Is it possible that the filename extension is misspelled?
We found the following similar file extensions in our database:
🔴 Can't open a .arj file?
When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:
Windows cannot open this file:
example.arj
To open this file, Windows needs to know what program you want to use to open it...
If you don't know how to set the .arj file association, check the FAQ.
🔴 Can I change the extension of files?
Changing the filename extension of a file is not a good idea. When you change a file's extension, you change the way programs on your computer read the file. The problem is, changing the file extension does not change the file format.
If you have helpful information about the .arj file extension, write to us!