File size: 2.8 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.
The main features of 7-Zip
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
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 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
Whats New
7-Zip now can extract VHDX disk images (Microsoft Hyper-V Virtual Hard Disk v2 format).
New switches: -spm and -im!{file_path} to exclude directories from processing for specified paths that don't contain path separator character at the end of path.
In the "Add to Archive" window, now it is allowed to use -m prefix for "Parameters" field as in command line: -mparam.
The sorting order of files in archives was slightly changed to be more consistent for cases where the name of some directory is the same as the prefix part of the name of another directory or file.
TAR archives created by 7-Zip now are more consistent with archives created by GNU TAR program.



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