01 · Live Runtime
A real Node.js runtime, executing in your browser
WebContainer boots a virtualized Linux environment on top of WASM — real npm, real filesystem, real processes. Edit code on the left, click Run, watch a live Express server start without ever leaving your tab.
index.js
20 linesLoading editor…
Terminal · zsh
00:44:06.42$ runtime idle — press Run to boot Node.js
Node.js v18.18.2·WASM Runtime·idle
UTF-8LFJavaScript