Clojure beyond the JVM — native binaries, WebAssembly, instant startup.

A from-scratch Clojure implementation with no JVM: a single small native binary that starts in milliseconds, and a WebAssembly FFI that lets Clojure call modules compiled from Rust, Go, Zig or C as if they were ordinary functions.

No longer maintained. v1.10.1 is the final release, and the released binaries stay up — brew install clojurewasm/tap/cljw still works. The repository stays open and unarchived so it remains forkable; Issues are off and Pull Requests will not be reviewed, but Discussions are open and the announcement explains the wind-down. There are no security fixes — do not run it against untrusted input.

An experimental ClojureScript-to-JavaScript compiler plus the su component framework, with zero dependencies. Archived.

Compiling Clojure source into WIT-typed WebAssembly components. Archived.

zwasm — the fast, spec-compliant WebAssembly runtime in Zig that ClojureWasm embeds — left this organisation for its own, where it continues under active, separate maintainership. It is a standalone runtime useful well beyond Clojure, with a JIT, AOT compilation, WASI 0.3 and the Component Model. If you came here for the WebAssembly part, that is where to go — and where a bug report can still be acted on.

Two demo applications and a games collection — the Playground, the Bookshelf, and cw-arcade — are archived and their hosted instances shut down. Their source stays public: each built cljw from source in its Dockerfile, so they remain a complete worked example of deploying this runtime end to end.

Thanks to everyone who used these, reported differences, and contributed fixes.