Apache projects,
in your browser

Each project below runs entirely in this tab — compiled to WebAssembly, with no server, no container and no signup. Pick one and it boots in front of you, downloads and all.

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    How this works

    A runtime is fetched into the page — CPython through Pyodide, a Rust engine as wasm, an OpenJDK JVM through CheerpJ — and then the real project runs on it. The downloads are large and honest about it: every page shows what it is fetching while it fetches it.