babel-minify (formerly Babili)

An ES6+ aware JavaScript minifier based on the Babel toolchain. Current stable version is 0.5.2, released in 2018. Development has been stalled since then; it is effectively in maintenance mode. Unlike traditional minifiers (UglifyJS, Terser), babel-minify operates on an AST that can understand modern ES6+ syntax, allowing it to minify code without needing to down-compile first. It works as a standalone CLI tool or as a Babel preset. Note: it is deprecated in favor of Terser for most use cases because Babel itself stopped maintaining it.