File Size : 2.5 Mb

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.

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, 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

Self-extracting capability for 7z format

Integration with Windows Shell

Powerful File Manager

Powerful command line version

Plugin for FAR Manager

Localizations for 87 languages

7-Zip 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 32-bit x86 executables

BCJ2 - Converter for 32-bit x86 executables

BZip2 - Standard BWT algorithm

Deflate - Standard LZ77-based algorithm

High compression ratio

Variable dictionary size (up to 4 GB)

Compression speed: about 1 MB/s on 2 GHz CPU

Decompression speed: about 10-20 MB/s on 2 GHz CPU

Small memory requirement for decompression (depend from dictionary size)

Small code size for decompression: about 5 KB

Supports multi-threading and P4's hyper-threading
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