HTML CSS JS Playground

Write HTML, CSS, and JavaScript in one browser-based playground with live preview and console output.

All processing happens in your browser. Your data never leaves your device.

Browser Playground

HTMLLive local editor

CSSLive local editor

:root {
  color-scheme: light dark;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
  font-family: "Plus Jakarta Sans", system-ui, sans-serif;
  background:
    radial-gradient(circle at top, rgba(34, 197, 94, 0.18), transparent 32%),
    linear-gradient(180deg, #f8fafc 0%, #eef2ff 100%);
  color: #0f172a;
}

.card {
  width: min(100%, 540px);
  padding: 24px;
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid rgba(148, 163, 184, 0.24);
  box-shadow: 0 24px 60px rgba(15, 23, 42, 0.12);
  backdrop-filter: blur(12px);
}

.eyebrow {
  display: inline-flex;
  margin-bottom: 12px;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(34, 197, 94, 0.14);
  color: #15803d;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1 {
  margin: 0 0 12px;
  font-size: clamp(28px, 5vw, 40px);
  line-height: 1.05;
}

p {
  margin: 0 0 18px;
  line-height: 1.6;
}

button {
  border: 0;
  border-radius: 14px;
  padding: 12px 16px;
  font: inherit;
  font-weight: 700;
  color: white;
  background: linear-gradient(135deg, #16a34a, #2563eb);
  cursor: pointer;
}

JavaScriptLive local editor

PreviewSandboxed iframe render

Console

Console output and uncaught runtime errors will appear here after you run the preview.

How to Use HTML CSS JS Playground

Use this page when you need a quick JSBin-style playground for HTML, CSS, and JavaScript in one place. It is built for developers who want to prototype UI ideas, debug snippets, or test frontend behavior with a live preview and console output directly in the browser.

1Paste or type your input in the left panel.
2Click Process or use the keyboard shortcut ⌘↵.
3View the result in the output panel. Use Copy to copy to clipboard or Download to save as a file.

Best use cases

•Prototype a small UI interaction quickly without creating a full project or local build setup.
•Test HTML, CSS, and JavaScript snippets together while watching console.log output and runtime errors.
•Share or export a combined demo file after validating that the markup, styles, and script work together.

This tool processes data locally in your browser. Nothing is sent to external servers.

Examples

Example playground starter

HTML:
<button id="hello">Click me</button>
<p id="message"></p>

CSS:
button { padding: 10px 14px; border-radius: 10px; }

JavaScript:
document.getElementById("hello")?.addEventListener("click", () => {
  console.log("Button clicked");
  document.getElementById("message").textContent = "Hello from the playground";
});

What this browser playground is best for

•The strongest use case is fast frontend prototyping with HTML, CSS, and JavaScript side by side instead of isolated snippet testing.
•The built-in console is useful for quick debugging, especially when you want to inspect logs and runtime errors without opening a larger project.
•Because everything runs locally in the browser, it works well for private UI experiments and teaching examples that should not be uploaded elsewhere.

Frequently Asked Questions

What does the HTML CSS JS Playground do?

It gives you one place to write HTML, CSS, and JavaScript together, render the result in a preview frame, and inspect console output in the browser.

Is this like JSBin or a CodePen-style editor?

Yes. It is a lightweight browser-based playground for quick frontend experiments, demos, and debugging, similar to the core workflow people use JSBin for.