7-Zip 4.65

Compression and decompression tools is the most common software.You can use it compress document or images to save disk space and transfer quickly, also can decompress file or video from internet.

Maybe you often use WinZIP or WinRAR, however there is also other alternative you may find very powerful and easy to use. 7-Zip, another free and open source software.

As an website editor,I test and review lots of software, have to decompress software package very often, so I care much more about compression ratio and speed. 7-Zip is the one I found that has high compression ratio with high compression speed.

7-zip also features password protect for file. It supports zip,rar and 7z formats. So you don`t have to use another compression file as well, 7-zip is all in one solution.

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 new 7z format with LZMA compression
* Supported formats:
o Packing / unpacking: 7z, ZIP, GZIP, BZIP2 and TAR
o Unpacking only: ARJ, CAB, CHM, CPIO, DEB, DMG, HFS, ISO, LZH, LZMA, MSI, NSIS, RAR, RPM, UDF, 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 74 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.