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

Download 7-Zip 9.38 beta (2015-01-03) 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


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 87 languages

7-Zip works in Windows 10 / 8 / 7 / Vista / XP / 2013 / 2008 / 2003 / 2000 / NT. 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 WinRAR 5.20.

FILE SETS: Mozilla Firefox 34.0.5 for Windows and Google Earth for Windows.

Archiver Mozilla Firefox Google Earth
65 files
85 280 391 bytes
483 files
110 700 519 bytes
Compressed size Ratio Compressed size Ratio
7-Zip 9.35
39 357 375 100% 15 964 369 100%
WinRAR 5.20
-m5 -s -ma5 -md128m
41 789 543 106% 17 035 432 107%

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 9.38 beta 2015-01-03
7-Zip 9.38 beta

7-Zip 9.36 beta 2014-12-26
7-Zip 9.36 beta

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) 2015 Igor Pavlov.