Explore IOCCC 2020 entries in the browser via CheerpX (x86-to-WASM JIT)
Linux virtual machine, running in the browser via HTML5/WebAssembly. Networking and graphics supported.
Explore IOCCC 2020 entries in the browser via CheerpX (x86-to-WASM JIT) launched on January 13, 2021 with 5 votes, #1,387 of 3,157 launches that month and more than 50% of that year's launches. The site was still online in September 2026, 5 years on.
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CheerpX – x86 Node.js/python3/Ruby REPL in browser via WebAssembly JIT2021 · repl.leaningtech.com · ▲88Linux virtual machine, running in the browser via HTML5/WebAssembly. Networking and graphics supported.
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Firefox in WebAssemblyJul 2026 · developer.puter.com · ▲273This is the entire Firefox browser rendering to a element. Gecko, all UI components, and the Spidermonkey JS engine are all compiled and running in WebAssembly. Here are a few things you might find interesting: - This is fully end to end encrypted! We use the WISP protocol for TCP-over-websockets. - There is a novel WASM->JS JIT for experimental site speedup - This port cost over 25k in opus/fable tokens for debugging and JIT research This was just a fun experiment to push the boundaries of WebAssembly. For a more usable "browser in browser" experience, we also built…
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