Code Playground

The Code Playground is a free, browser-based live code editor that lets you write HTML, CSS, and JavaScript and instantly see the results in a live preview panel. It's the fastest way to prototype web ideas, test code snippets, or learn front-end development without setting up a local environment.

Unlike cloud-based alternatives, this HTML/CSS/JS playground runs entirely in your browser. Your code is never sent to a server — it executes locally in a sandboxed iframe, giving you instant feedback as you type. The editor features syntax highlighting, auto-save, console output capture, and starter templates to get you going quickly.

1. Write your code — Use the HTML, CSS, and JavaScript editor panels to write your front-end code. Each panel has syntax highlighting and auto-indentation.
2. See live preview — The preview panel updates automatically as you type, showing the rendered output of your HTML, CSS, and JavaScript together.
3. Check the console — Any console.log(), errors, or warnings appear in the built-in console panel — no need to open browser DevTools.
4. Use templates — Start from a blank slate or pick a starter template to bootstrap common patterns like flexbox layouts, animations, or API fetches.
5. Auto-save — Your code is saved to local storage automatically, so you won't lose work if you accidentally close the tab.

• Live preview — Real-time rendering of HTML, CSS, and JavaScript in a sandboxed iframe.
• Built-in console — Captures console.log, errors, and warnings without needing browser DevTools.
• Syntax highlighting — Color-coded editor for HTML, CSS, and JavaScript with proper indentation support.
• Starter templates — Pre-built templates for common patterns to jump-start your prototyping.
• Auto-save — Code persists in browser local storage between sessions.
• 100% offline capable — No server required. Everything runs in your browser.

• Rapid prototyping — Test a CSS layout idea, animation, or JavaScript interaction in seconds without a build step.
• Learning HTML/CSS/JS — Perfect for beginners following tutorials — type code and see results immediately.
• Bug reproduction — Create minimal reproductions of front-end bugs to share with your team or post on Stack Overflow.
• Interview prep — Practice front-end coding challenges with instant visual feedback.
• Snippet testing — Quickly test a JavaScript function, regex, or DOM manipulation before adding it to your project.