The 7z format is built on an , which allows it to support various compression, conversion, and encryption methods.
License. 7-Zip is free software with open source. The most of the code is under the GNU LGPL license. Topic: Is it time to give up on 7-Zip? @ AskWoody
: While it primarily uses LZMA and LZMA2 , it also supports Bzip2 , PPMd , and Delta .
: It can handle theoretically massive archives up to approximately 16 exbibytes ( 2642 to the 64th power Comparison: 7z vs. Other Formats