Download source - 8.52 KB About 7-Zip 7-Zip is an open-source archive program with plug-in interface. New archive formats and/or archive codecs can be added by DLLs. 7-Zip ships with several archive formats preinstalled: 7z — its own format features good compression (LZMA, PPMd) but can be slow in terms of packing/unpacking Packing / unpacking: ZIP, GZIP, BZIP2 and TAR Unpacking only: RAR, CAB, IS