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# 7-Zip 7-Zip is a file archiver with a high compression ratio. Download 7-Zip 9.20 (2010-11-18) for Windows:
Link | Type | Windows | Size
--- | --- | --- | ---
Download | .exe | 32-bit x86 | 1 MB
Download | .msi | 64-bit x64 | 1 MB
The download links above redirect you to download pages on SourceForge.net ## License 7-Zip is open source software. Most of the source code is under the GNU LGPL license. The unRAR code is under a mixed license: GNU LGPL + unRAR restrictions. Check license information here: 7-Zip license. You can use 7-Zip on any computer, including a computer in a commercial organization. You don't need to register or pay for 7-Zip. ## 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: ARJ, CAB, CHM, CPIO, CramFS, DEB, DMG, FAT, HFS, ISO, LZH, LZMA, MBR, MSI, NSIS, NTFS, RAR, RPM, SquashFS, UDF, VHD, 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 79 languages 7-Zip works in Windows 7 / Vista / XP / 2008 / 2003 / 2000 / NT / ME / 98. There is a port of the command line version to Linux/Unix. On 7-Zip's Source Forge Page you can find a forum, bug reports, and feature request systems. ## Compression ratio We compared 7-Zip with some of the leading archivers. FILE SETS: Mozilla Firefox 1.0.7 for Windows and Google Earth 3.0.0616 for Windows after full installation.
Archiver | Mozilla Firefox | Google Earth
--- | --- | ---
161 files 15,684,168 bytes | 115 files 23,530,652 bytes
Compressed size | Ratio | Compressed size | Ratio
7-Zip 4.23 (7z format) | 4621135 | 100% | 6109183 | 100%
WinRAR 3.50 | 5021556 | 109% | 6824892 | 112%
CABARC 5.1 | 5131393 | 111% | 7434325 | 122%
WinZip 10.0 beta (maximum-PPMd) | 5277118 | 114% | 8200708 | 134%
7-Zip 4.23 (zip format) | 6222627 | 135% | 8909446 | 146%
WinZip 10.0 beta (maximum-portable) | 6448666 | 140% | 9153898 | 150%
Compression ratio results are very dependent upon the data used for the tests. Usually, 7-Zip compresses to 7z format 30-70% better than to zip format. And 7-Zip compresses to zip format 2-10% better than most of other zip compatible programs. |
7-Zip 9.30 alpha | 2012-10-26
7-Zip 9.30 alpha
7-Zip 9.25 alpha | 2011-09-16
Forum: 7-Zip 9.25 alpha Download 7-Zip 32-bit Download 7-Zip x64
7-Zip 9.22 beta | 2011-04-18
7-Zip 9.22 beta
7-Zip 9.20 | 2010-11-18
History of 7-zip changes
Copyright (C) 2012 Igor Pavlov.