2ac.7z -

It acts as a universal archive tool, supporting packing/unpacking of 7z, TAR, ZIP, GZIP, and unpacking many others like RAR, CAB, and DMG.

The proprietary .7z format, especially when using the LZMA2 algorithm, offers significantly smaller archive sizes compared to ZIP, often 30-70% smaller.

7-Zip is a free, open-source file archiver with a high compression ratio, making it an essential utility for Windows users, though it has seen recent security disclosures and faces stiff competition from faster alternatives.