What 7-Zip does
7-Zip 26.03 is an open-source archiver whose publisher lists separate Windows installers, MSI packages, command-line extras, Linux tar archives, and a macOS console archive. The Windows EXE is the publisher's recommended desktop package; the MSI is an alternative for managed deployment, while 7-Zip Extra is a console/DLL bundle rather than the full desktop installer.
The project documents creation of 7z, ZIP, TAR, GZIP, BZIP2, XZ, and WIM archives and extraction of additional formats. Compression results depend on the input corpus, archive format, method, dictionary, memory, and comparison settings, so this record makes no universal ratio or speed claim. AES-256 is available for 7z and ZIP, but encryption does not make extracted content trustworthy and metadata exposure varies by format and options.
The Linux and macOS downloads are command-line tar archives, not distribution-native desktop packages. Shell integration and the graphical file manager apply to Windows. The license page identifies component-level exceptions, including unRAR restrictions, so “LGPL” alone is not a complete license description.
Release 26.03 fixes a Mark-of-the-Web preservation issue described in the linked release notes. The SHA-256 values below come from the official GitHub release asset metadata checked on 2026-09-11; no local install, signature inspection, compression benchmark, or archive-recovery test was performed.