html HTML Preview

About the HTML/CSS/JS Editor

Write and preview HTML, CSS, and JavaScript code in real-time with our free online code editor. Similar to CodePen, this tool provides a live preview environment perfect for learning, prototyping, and sharing code snippets.

Features

• Three-Panel Editor — Separate panels for HTML, CSS, and JavaScript
• Live Preview — See changes instantly as you type
• Console Output — View console.log output directly in the editor
• Flexible Layouts — Horizontal, vertical, or preview-only modes
• Collapsible Panels — Expand panels you're working on
• CSS Framework Templates — Quick start with Bootstrap or Tailwind
• Fullscreen Preview — View your design without distractions
• Export — Download complete HTML file with embedded CSS/JS

Use Cases

• Learning HTML, CSS, and JavaScript basics
• Testing code snippets from tutorials
• Prototyping layouts and interactions quickly
• Debugging rendering or JavaScript issues
• Creating and sharing code examples
• Experimenting with CSS animations and effects

Tips for Best Results

• Use the CSS panel for styles instead of inline styles
• The JavaScript runs after the HTML is rendered
• Check the Console panel for any JavaScript errors
• Use templates to quickly load CSS frameworks
• Toggle auto-refresh off when writing complex code