7-Zip is a file archiver with a high compression ratio. Usually, 7-Zip compresses to 7z format 30-70% better than to zip format. High compression ratio in new 7z format with LZMA compression. Supported formats – Packing / unpacking: 7z, ZIP, GZIP, BZIP2 and TAR. Unpacking only: 7z, ZIP, RAR, GZIP, GZ, BZIP2, BZ2, TAR, CAB, ISO, ARJ, LZH, LHA, CHM, MSI, WIM, Z, CPIO, RPM, DEB, CPIO, DMG, FAT, HFS, LZMA, NTFS, SPLIT, SWM, TAZ, TBZ, TBZ2, TGZ, TPZ, VHD, XAR, XZ, Z and NSIS. For ZIP and GZIP formats, 7-Zip provides a compression ratio that is 2-10 % better than the ratio provided by PKZip and WinZip. Self-extracting capability for 7z format. Integration with Windows Shell. Powerful File Manager. Localizations for 70 languages. It’s a freeware post
Powerful command line version
Plugin for FAR Manager
7-Zip works in Windows 98/ME/NT/2000/XP/Vista. There is a port of the command line version to Linux/Unix.
Compression ratio results are very dependent upon the data used for the tests.
The main features of 7z format:
High compression ratio
Strong AES-256 encryption
Ability to use any compression, conversion or encryption method
Supports files with sizes up to 16000000000 GB
Unicode file names
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