What is an ARJ file?
An .ARJ file is an ARJ Compressed File Archive. It compresses multiple files and folders into a single archive to save disk space. The format was developed by Robert K. Jung and ARJ Software. It was highly popular in the 1990s for sharing files across bulletin board systems (BBS) and storing data on floppy disks.
How to open ARJ files?
Modern operating systems do not support the .ARJ format by default. To extract the contents of an .ARJ archive, you need third-party utility software. Popular programs that handle this format include WinRAR and 7-Zip for Windows, or The Unarchiver for macOS. You can also use the original command-line tools provided by ARJ Software if you are working in a legacy environment.
Inspect and identify with viewer.online
If you have an unknown archive, viewer.online/arj analyzes .ARJ files to identify their exact format and creator software. It shows which programs can open the file and usually previews the contents directly on your screen without any extraction step.
Best practices and conversion
Because .ARJ is a legacy format, it is often difficult to share these files with other users today. We recommend converting them to modern, widely supported formats. You can use convert.guru to quickly convert .ARJ archives into standard .ZIP or .7Z files.
Summary
viewer.online/arj directly opens and previews .ARJ files in the browser, eliminating the need to install software or troubleshoot compatibility issues.