License:
Free
Operating Systems:
Windows 2003, Windows Vista, Windows Me, Windows XP, Windows 2000, Windows NT, Windows 98
Additional Requirements:
No additional requirements
Limitations:
No limitations.
Publisher's description of 7-Zip
The main features of 7-Zip: High compression ratio in new 7z formatwith LZMA compression. Supported formats: Packing / unpacking: 7z, ZIP,GZIP, BZIP2 and TAR; Unpacking only: ARJ, CAB, CHM, CPIO, DEB, DMG,HFS, ISO, LZH, LZMA, MSI, NSIS, RAR, RPM, UDF, WIM, XAR and Z. For ZIPand GZIP formats 7-Zip provides compression ratio that is 2-10 % betterthan ratio provided by PKZip and WinZip. Self-extracting capability for7z format. Integration with Windows Shell. Powerful File Manager.Powerful command line version.
It's easy for Windows users to forget that WinZip isn't the onlyfile-compression utility in the world. Like its better-knowncompetitors, the free 7-Zip unpacks a host of archive formats,including ZIP, TAR, GZ, and its own 7z format. Unlike WinZip, though,it can create TAR and GZ archives, which are commonly used on Unix andLinux systems.
The program's ability to shrink files was stunning. In our tests,7z archives were up to 40 percent smaller then their ZIP equivalents,although compression did take longer, and the highest compressionsettings can hog system resources. Advanced options include the abilityto create solid and self-extracting archives, and to adjust thecompression level and password protection. The program also has acommand line module. Though the main interface is overly simple andlooks like it was designed for Windows 95, it's not hard to use andfairly self-explanatory. The context menu options, which include"testing" an archive, indicate that 7-Zip should be taken seriously.
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