The main features of 7-Zip High compression ratio in new 7z format with 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 ZIP and GZIP formats 7-Zip provides compression ratio that is 2-10 % better than ratio provided by PKZip and WinZip. Self-extracting capability for 7z format. Integration with Windows Shell. Powerful File Manager. Powerful command line version.