What is a .SITX file?
SITX is the newer StuffIt X archive format for macOS.
- Did you know
- StuffIt X improved on the original SIT format with better compression.
- StuffIt X added algorithms such as PPM, BWT and LZMA, plus strong encryption and Unicode file names.
- The format was later owned by Smith Micro Software, which declared StuffIt end-of-life in 2019.
- What Analyser reads
- Open more archives, packages and installers: macOS XAR/.pkg/.mpkg installers (member list), Windows .msu updates (CAB), Snap SquashFS packages, Flatpak bundles, StuffIt (.sit/.sitx), lzop (.lzo) and Brotli (.br) streams, Java Web Start (.jnlp), and the .tlz/.tbz/.tz compressed-tarball shorthands.
- Depth of analysis
- .SITX 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 .SITX file
- Drag a .SITX 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.