7-Zip is a file archiver with a high compression ratio. Supported formats: Packing / unpacking: 7z, zip, gzip, bzip2 and tar. Unpacking only: arj, cab, chm, cpio, deb, dmg, hfs, iso, lzh, lzma, msi, nsis, rar, rpm, udf, wim, xar and z. for zip and gzip formats, 7-Zip provides a compression ratio that is 2-10 % better than the ratio provided by PKZip and WinZip. Strong AES-256 encryption in 7z and ZIP formats. Integration with Windows Shell