Ninja (build system)

Ninja
DeveloperEvan Martin
Initial release2012 (2012)
Stable release
1.13.2  / 20 November 2025 (20 November 2025)
Written inC++, Python
Operating systemLinux, macOS, Windows
TypeSoftware development tools
LicenseApache License 2.0
Websiteninja-build.org 
Repository

Ninja is a build system developed by Evan Martin, a Google employee. Ninja has a focus on speed and it differs from other build systems in two major respects: it is designed to have its input files generated by a higher-level build system, and it is designed to run builds as fast as possible.