Instant React.
Zero Configuration.
Zero Configuration.
Zero Configuration.
The ultimate React online playground. Inject CDNs instantly. No npm installs, no build steps, just instant client-side rendering.
A Lightning-Fast React Workspace.
Skip the terminal. No npm installs, no webpack configuration. Write pure JSX and see your UI render instantly. Engineered for rapid component prototyping directly in the browser.
Native JSX Compilation
Our engine transpiles your JSX in real-time, directly within your browser's memory. Test state hooks, effects, and complex component trees with near-instant updates.
const [count, setCount] = React.useState(0);
return <button onClick={() => setCount(count + 1)}>{count}</button>;
}
Instant Dependency Injection
Fetch any React library from unpkg. Want to prototype an animation with Framer Motion? Just inject it via the developer console.
⚡ Framer Motion Injected.
Global State Visualizer
Debugging React state is seamless. Bind your state objects to the NitroIDE visualizer and watch them update live as you interact with your app.
Nitro.watch('Counter', count);
Full Workspace. $0.
Other cloud web IDEs charge you monthly just to keep your frontend projects private. We built a free, local code editor for the community.
Free Forever — The Only Plan
Every built-in feature free. No card required.
How It Works
From idea to running component in four steps.
Step 1 — Open the React workspace
Launch the playground — no npm install, no create-react-app, no terminal. React 18 is preloaded and ready to render.
Step 2 — Write JSX
Define components with hooks and JSX directly in the editor. Your code is transpiled in the browser in real time as you type.
Step 3 — Add libraries
Need Framer Motion, a charting library, or anything else? Inject it from unpkg with one console command and import it in your component.
Step 4 — Debug and export
Watch state update live with the state visualizer, then export the whole prototype as a ZIP when you're ready to move it into a real codebase.
Common Questions
Straight answers about the React playground.
How does JSX work with no build step?
Your JSX is transpiled directly in the browser as you type, so components render instantly. You skip the entire toolchain — no Babel config, no bundler — which makes it ideal for rapid prototyping.
Which React version is included?
React 18, loaded from CDN. Hooks like useState and useEffect, fragments, and modern JSX conventions all work the way you'd expect.
Can I use hooks and manage component state?
Yes. useState, useEffect, useRef, and custom hooks all run normally, and the built-in state visualizer lets you watch values change as you interact with your UI.
Can I add third-party React libraries?
Yes — inject any package from unpkg through the workspace console (for example, > install framer-motion) and use it in your components right away.
What happens when my prototype outgrows the playground?
Export it as a ZIP and continue in a full toolchain. The playground is built for speed of iteration; nothing about it locks you in.