Quote:7Zip is a file archiver with a high compression ratio. Usually, 7Zip compresses to 7z format 3070% 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, 7Zip provides a compression ratio that is 210 % better than the ratio provided by PKZip and WinZip. Selfextracting capability for 7z format. Integration with Windows Shell. Powerful File Manager. Localizations for 70 languages.
The main features of 7Zip
High compression ratio in 7z format with LZMA and LZMA2 compression
Supported formats
Packing / unpacking: 7z, XZ, BZIP2, GZIP, TAR, ZIP and WIM
Unpacking only: AR, ARJ, CAB, CHM, CPIO, CramFS, DMG, EXT, FAT, GPT, HFS, IHEX, ISO, LZH, LZMA, MBR, MSI, NSIS, NTFS, QCOW2, RAR, RPM, SquashFS, UDF, UEFI, VDI, VHD, VMDK, WIM, XAR and Z.
For ZIP and GZIP formats, 7Zip provides a compression ratio that is 210 % better than the ratio provided by PKZip and WinZip
Strong AES256 encryption in 7z and ZIP formats
Selfextracting capability for 7z format
Integration with Windows Shell
Powerful File Manager
Powerful command line version
Plugin for FAR Manager
Localizations for 87 languages
7Zip works in Windows 10 / 8 / 7 / Vista / XP / 2012 / 2008 / 2003 / 2000 / NT. There is a port of the command line version to Linux/Unix.
7z has an open architecture, so it can support any new compression method, too. The following methods currently are integrated into 7z
LZMA Improved and optimized version of LZ77 algorithm
PPMD Dmitry Shkarin's PPMdH with small changes
BCJ Converter for 32bit x86 executables
BCJ2 Converter for 32bit x86 executables
BZip2 Standard BWT algorithm
Deflate Standard LZ77based algorithm
LZMA is the default and general compression method of 7z format. The main features of LZMA are
High compression ratio
Variable dictionary size (up to 4 GB)
Compression speed: about 1 MB/s on 2 GHz CPU
Decompression speed: about 1020 MB/s on 2 GHz CPU
Small memory requirement for decompression (depend from dictionary size)
Small code size for decompression: about 5 KB
Supports multithreading and P4's hyperthreading

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