HTML/CSS/JS Editor

Online HTML/CSS/JS Editor

Write HTML, CSS, and JavaScript code and see live results instantly with this free online editor. Build and test web pages directly in your browser without any setup. Perfect for prototyping, learning web development, and testing snippets.

What is HTML?

HTML (HyperText Markup Language) is the standard markup language for creating web pages. It defines the structure of content on the web using elements like headings, paragraphs, links, images, and forms. CSS styles these elements, and JavaScript adds interactivity.

Basic Structure

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>My Page</title>
  <style>
    body { font-family: sans-serif; }
    h1 { color: #0ea5e9; }
  </style>
</head>
<body>
  <h1>Hello World</h1>
  <script>
    console.log("Page loaded!");
  </script>
</body>
</html>

Try It Yourself

Write your HTML, CSS, and JavaScript in the editor and click Run to see the live preview. The editor provides syntax highlighting and autocompletion for all three languages. Use Copy to grab your code, Reset to restore the default template, and Theme to toggle dark/light mode.