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Hajipur, Bihar, 844101
🛠 Free Online Tool
HTML CSS JS Playground — Free Online Live Code Editor
Write HTML, CSS and JavaScript in separate editors and see the result instantly in a live preview panel. No installation. No signup. Runs entirely in your browser.
HTML
CSS
JavaScript
Live Preview
Instant Live Preview
Auto-run mode updates the preview in real time as you type. No reload needed.
Mobile Preview Mode
Switch between Desktop, Mobile (420px), and Responsive preview modes to test layouts.
Download as HTML
Export your entire project as a single .html file with HTML, CSS and JS combined.
Ace Editor + Autocomplete
Powered by Ace Editor with syntax highlighting, autocomplete and snippets for all three languages.
How to Use the HTML CSS JS Playground
Build and preview web pages in 3 simple steps — no account or install needed.
1
Write Your Code
Type or paste your HTML in the HTML editor, CSS styles in the CSS editor, and JavaScript in the JS editor. Or click Sample to load a starter project.
2
See Live Preview
With Auto Run enabled, the preview updates instantly as you type. Switch between Desktop, Mobile and Responsive preview modes using the toolbar.
3
Save or Copy
Use the Copy button to copy any editor's code, or click Save HTML File to download the full project as a single .html file.
What is an HTML CSS JS Playground?
An HTML CSS JS playground is a browser-based live coding environment where you write markup, styling and scripting in separate editors and see the rendered output in a preview panel — instantly. It is the fastest way to prototype web pages, experiment with CSS layouts, test JavaScript logic, and learn frontend development without any local setup.
⚡ Live Preview
🪟 Separate Editors
📱 Responsive Preview
📋 One-Click Copy
💾 Save as HTML
🔒 Client-Side Only
🌟 Syntax Highlighting
✃ Autocomplete
Frequently Asked Questions
Everything you need to know about the HTML CSS JS Playground.
An HTML CSS JS Playground is a browser-based live code editor where you can write HTML, CSS, and JavaScript in separate panels and instantly see the rendered output in a preview window — no installation or signup required.
Yes, completely free. No account, no signup, no credit card needed. Just open the page and start coding.
Yes. With Auto Run set to "Yes", the live preview updates automatically as you type in any of the HTML, CSS or JavaScript editors. You can also click Run Code to manually refresh.
Yes. Use the Preview Mode selector to switch between Desktop, Mobile (420px width), and Responsive modes to test how your code looks on different screen sizes.
Yes. Click Save HTML File to download a single combined HTML file containing your HTML, CSS and JavaScript code — ready to open in any browser or host on a server.
Yes. The editor is powered by Ace Editor with autocomplete and snippet support for HTML tags (div, section, input, button etc.), CSS properties (display, flex, border-radius etc.) and JavaScript functions (getElementById, addEventListener, fetch etc.).
No. All code runs entirely in your browser. Nothing is sent to any server — your code stays private and local to your device.
Yes. The HTML CSS JS Playground is fully responsive and works on mobile phones, tablets and desktop browsers.
About the CodePractice HTML CSS JS Playground
The CodePractice HTML CSS JS Playground is a free, browser-based online code editor that lets developers, students, and designers write and preview HTML, CSS, and JavaScript code instantly — without any installation, account, or setup. It is the fastest way to test a UI idea, practice frontend skills, or share a code snippet.
Write HTML Online with Live Preview
The HTML editor lets you write semantic markup with full syntax highlighting. As you type, the live preview pane renders your HTML instantly — so you can see exactly how your markup looks in a real browser environment. The editor also provides autocomplete suggestions for common HTML tags like <div>, <section>, <button>, <input>, and more.
Style with CSS — Instant Feedback
The CSS editor supports full stylesheet syntax with live autocomplete for properties like display: flex, border-radius, box-shadow, background, and more. Every CSS change reflects immediately in the preview panel, making it effortless to tweak layouts, colors, and typography.
Test JavaScript in the Browser
The JavaScript editor lets you write and test scripts that interact with your HTML elements in real time. JavaScript errors are caught and displayed directly in the preview panel — so you get clear feedback without opening DevTools.
Key Features
- ✓ Separate HTML, CSS and JavaScript editors in one screen
- ✓ Instant live preview with auto-run on keypress
- ✓ Mobile, Desktop and Responsive preview modes
- ✓ Ace Editor with syntax highlighting for all 3 languages
- ✓ Code autocomplete and snippet support
- ✓ Light and Dark editor theme
- ✓ One-click copy for any editor
- ✓ Download full project as a single HTML file
- ✓ JavaScript error display inside preview
- ✓ 100% client-side — no server, no data stored
- ✓ Fully responsive — works on mobile and desktop
- ✓ Free, no account or signup required
Who is this for?
Whether you are a beginner learning HTML and CSS for the first time, a developer prototyping a UI component, a teacher demonstrating frontend concepts, or a designer testing a layout — this playground gives you an instant, zero-friction environment to write and preview web code.
