StackBlitz
stackblitz.com
A browser-based IDE that runs Node.js projects entirely in the browser using WebContainers, with npm install, hot reload, and shareable URLs.
Why it is useful
Runs a genuine Node.js environment inside the browser — you can install npm packages, run build tools, and work with full-stack frameworks like Next.js or Vite without any local setup. Particularly useful for reproducing issues in a shareable environment or for onboarding contributors to a project with zero setup friction. WebContainers eliminate the gap between browser sandbox and real development environment.
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