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.