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。
下载地址:
7-Zip for 32-bit Windows:
http://7-zip.org/a/7z1804.exe
http://7-zip.org/a/7z1804.msi
7-Zip for 64-bit Windows x64:
http://7-zip.org/a/7z1804-x64.exe
http://7-zip.org/a/7z1804-x64.msi
更新列表:
The speed for LZMA/LZMA2 compressing was increased
by 8% for fastest/fast compression levels and
by 3% for normal/maximum compression levels.7-Zip now shows Properties (Info) window and CRC/SHA results window
as "list view" window instead of "message box" window.Some improvements in zip, hfs and dmg code.
Previous versions of 7-Zip could work incorrectly in "Large memory pages" mode in
Windows 10 because of some BUG with "Large Pages" in Windows 10.
Now 7-Zip doesn't use "Large Pages" on Windows 10 up to revision 1709 (16299).Some bugs were fixed.