A Self-Hostable Wasm Sandbox for JavaScript Workers | Kyushu<br>Skip to content Early experiment — expect breaking changes.<br>A Self-Hostable Wasm Sandbox for JavaScript Workers<br>Ever wanted to run a Cloudflare Workers-style handler, on a VPS or anywhere, without Node.js, Bun, or even Docker?<br>Terminal windowcurl -fsSL https://kyushu.dev/install | bash

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What is Kyushu?<br>Kyushu is an open source CLI that lets you write a JavaScript or TypeScript handler, build it into a self-contained WebAssembly binary, and run it anywhere with one command - kyu.<br>No Node, Bun, or Docker - just a single binary<br>Cloudflare Workers-style API - familiar fetch handler<br>Self-hostable - runs on a VPS or anywhere<br>WebAssembly sandbox - isolated from the host<br>Read docs

What people are saying (probably)<br>"But...why?"<br>JD<br>John Doe<br>Node.js Developer, NaN years experience

"I like Docker"<br>JS<br>Jane Smith<br>Senior YAML Engineer

"Have you heard of Bun?"<br>BJ<br>Bob Johnson<br>AI prompt master chef