What is a .7Z file?
7Z is a high-compression archive format. Created and opened by the free 7-Zip tool.
- Did you know
- 7z is the native format of 7-Zip, released in 1999, and usually compresses tighter than ZIP.
- The 7z format relies on LZMA, an algorithm Igor Pavlov wrote himself, and can encrypt its contents with 256-bit AES.
- Analyser spots a .7Z file by its signature bytes
37 7A BC AF.
- What Analyser shows you
- Browse the file tree and compression details of archives without extracting them: ZIP in pure JavaScript, and RAR, 7z, TAR and compressed tarballs (.tar.gz / .tgz, .tar.xz, .tar.zst, .tar.bz2) through a bundled libarchive engine - click any file inside to analyse it. A single compressed stream (.gz, .xz, .zst, .lz4, .lzma, .Z) is decompressed so the file within can be opened; bare .bz2 streams are identified only.
- Open a .7Z file
- Drag a .7Z file onto the Analyser home page (or tap to pick one). It opens entirely in your browser - nothing is uploaded, there is no account, and it works offline once installed.