The fastest way to learn web development is to change something and see it happen. GoCode's HTML, CSS and JavaScript playground gives you three tabs and a live preview that renders as you type — no files, no server, no setup.

How it works

Pick HTML/CSS/JS in the IDE and you get three separate editors:

HTML for your markup,
CSS for styling,
JS for behaviour.

They're combined automatically and shown in a live, sandboxed preview beside your code. Edit any tab and the preview updates.

A tiny example

In the HTML tab:

<h1>Hello</h1>
<button id="btn">Click me</button>
<p id="out"></p>

In the JS tab:

document.getElementById("btn").onclick = () => {
  document.getElementById("out").textContent = "Clicked!";
};

Add a splash of CSS and you've built your first interactive page. Prefer components? There's a React mode too, with JSX and live rendering. Open the playground and start building.

HTML, CSS & JavaScript Playground — Build in the Browser

How it works

A tiny example