7-Zip是一个开放源码的数据压缩程序，主要用在Microsoft Windows操作系统，Unix-like的操作系统如Linux与 FreeBSD下面有7-zip的移植版本p7zip可以使用。它提供命令行接口的程序或图形用户界面的程序，而且可以与资源管理器结合。7-Zip是自 由软件，由Igor Pavlov于1999年开始发展，并把主体在GNU LGPL下发布，加密部份使用AES的代码，使用BSD license发布，解压RAR部分使用RAR特定的许可协议。
Changes in 7-Zip 15.06 Beta (2015-08-09):
* 7-Zip now can extract RAR5 archives.
* 7-Zip now doesn’t sort files by type while adding to solid 7z archive.
* new -mqs switch to sort files by type while adding to solid 7z archive.
* The BUG in 7-Zip File Manager was fixed: The “Move” operation to open 7z archive didn’t delete empty files.
* The BUG in 15.05 was fixed: console version added some text to the end of stdout stream, is -so switch was used.
* The BUG in 9.30 – 15.05 was fixed: 7-Zip could not open multivolume sfx RAR archive.
* Some bugs were fixed.
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