What is a .ARJ file?
ARJ is a DOS-era compressed archive format.
- Did you know
- ARJ ("Archived by Robert Jung") was a popular DOS archiver in the early 1990s.
- ARJ splits a large archive across numbered volumes, the first ending .arj and the rest .a01, .a02 and so on, handy for fitting an archive onto floppy disks.
- ARJ combined Lempel-Ziv compression with Huffman coding and added extras such as self-extraction and long-filename support.
- What Analyser reads
- Read software packages and Unix archive streams: Python wheels, NuGet, Chrome/Firefox/VS Code extensions, Electron ASAR, Windows APPX/MSIX, Debian (DEB), RPM, RubyGems, conda, Anki, Microsoft CAB, cpio and ar - showing name, version, dependencies and the file tree.
- Depth of analysis
- .ARJ is an identification-grade format: Analyser recognises it from its bytes and decodes the header metadata it carries, rather than opening it in a full viewer. Formats that do get a full viewer are marked "Full" on the formats page.
- Open a .ARJ file
- Drag a .ARJ file onto the Analyser home page (or tap to pick one). It is identified entirely in your browser - nothing is uploaded, there is no account, and it works offline once installed.