7-Zip 9.20 is a free file archiver software with a high compression ratio . Compression ratio in the new 7z format is 30-50% better than ratio in ZIP format . And 7-Zip compresses to zip format 2-10% better than other zip compatible programs .

It operates with the 7z archive format, and can read and write several other archive formats. The program can be used from a command line interface, graphical user interface, or Windows shell integration . Command line version of 7-Zip can be used in Linux via Wine program .

7-Zip 9.20 Screenshot :

• 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