How can I test React code in the browser without npm?

You can test React code instantly using NitroIDE's built-in CDN injector. It fetches React and ReactDOM directly from unpkg, allowing you to write JSX and see live results with zero build steps or npm installations.

Does this online React playground support Tailwind CSS?

Yes, you can inject Tailwind CSS directly into the React playground using the integrated package manager or CLI, allowing you to style your components instantly.

v24.0 Live

Zero Latency

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.

— developers visited

function compile() {
engine.run({
target: "local_memory",
speed: "0ms"
});
}

Launch Workspace Read the Docs

React 18 JSX CDN Injection Tailwind ES6+

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 absolute zero latency.

function App() {
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.

> install framer-motion
⚡ 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.

// Watch component state
Nitro.watch('Counter', count);

Enterprise Grade. Zero Cost.

Other cloud web IDEs charge you monthly just to keep your frontend projects private. We built a free, local code editor for the community.

Server Latency

Client-Side Privacy

Local Workspaces

Community Plan

$0/forever

Everything is unlocked. No credit card required.

Unlimited Local Projects

Complete Privacy (Client-Side Only)

Developer Command Line

100% Free & Open Source Codebase

Launch Workspace

Instant React. Zero Configuration. Zero Configuration. Zero Configuration.