LilScript makes JavaScript libraries smaller

In plain words

LilScript is a typed, compression-first programming language that compiles to JavaScript. It produces optimized code that is 5-15% smaller than standard JS toolchains like esbuild and terser, even after gzip compression. The tool is designed for developers building JavaScript libraries who want to reduce file size without sacrificing performance. It has demonstrated results on real projects, including reducing VSCode's core modules by 20% on average and improving both size and speed of existing npm packages.

written from the facts on this page · September 2026

From the sources

In the maker’s words, at launch

https://yeargun.github.io/lilscript/ LilScript is a typed, compression-first language that compiles into js and sometimes into exec(will be more stable in future). The compiler mangles, reshapes the program into optimized js that happens to be 5-15% smaller (after gzip/br compression or raw)…

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