7z is a data compression and archival file format.

7z, 7Z, or 7-Z may also refer to:

7-Zip, an open source file archive software for 7z and other formats Clerget 7Z, a seven-cylinder rotary aircraft engine The IATA code for former airline Halcyonair The IATA code for current airline Ameristar Jet Charter

See also Z7 (disambiguation)