A 7z extractor is an application which reads 7z compressed archives. The 7z format is very efficient and supports different compression methods including LZMA, LZMA2 and Bzip2. Extractors work with dozens of file types and are available on operating systems including Windows, MAC, LINUX, ChromeOS and Android.

There are many tools used for the compression/decompression of files and file archives. Although originally associated with particular operating systems, tools such as ZIP, gzip, RAR and 7-Zip often work with files compressed using other tools. Many operating systems and environments come with their own, built-in tools which recognize files created by other operating systems and their compression tools as well as those available from third-parties, open source or commercially.