HTML Viewer

Free Online HTML Editor: Live Code Viewer & Preview Tool

Our free online HTML editor allows you to code, test and instantly visualize your web pages with a live preview. Whether you're a web developer, designer, programming student or HTML/CSS/JavaScript beginner, this HTML code viewer offers a complete development environment in your browser: syntax-highlighted code editors for HTML, CSS and JavaScript, instant live preview, ready-to-use templates, external libraries (Bootstrap, jQuery, Font Awesome), full HTML file export, and integrated JavaScript console for debugging. Test your HTML/CSS/JS code without installing any software.

Why Use an Online HTML Editor?

An online HTML editor (also called HTML playground, code sandbox or live HTML editor) is a web tool that allows you to create, modify and test HTML, CSS and JavaScript code directly in your browser, without software installation. It's the ideal solution for rapid prototyping, learning web development, cross-browser compatibility testing, code snippet sharing, and real-time technical demonstrations.

Instant Real-Time Preview

Our HTML viewer with live preview instantly displays your code's rendering as you type. Enable Auto-refresh mode to see every change in real-time without clicking "Run". This live coding feature dramatically speeds up development by letting you immediately see the impact of each CSS or JavaScript line on your web page.

Complete Development Environment

Unlike simple HTML viewers, our online code editor offers a professional environment with advanced syntax highlighting, line numbering, HTML tag auto-completion, error detection, and automatic code formatting (beautify HTML/CSS/JS). Keyboard shortcuts (Ctrl+Enter to run, Ctrl+S to save, Ctrl+Shift+F to format) speed up your development workflow.

HTML Editor Features

Our HTML code tester integrates professional features to maximize your web development productivity.

Ready-to-Use HTML Templates

Save time with our library of professional HTML templates: Bootstrap Card, Login Form, Animated Button, Counter App, Todo List, Pricing Table. Each template includes pre-configured HTML, CSS and JavaScript. Perfect for quickly starting a project or learning code structuring best practices. Click "Templates" in the toolbar to browse and instantly load a template into the editor.

External Libraries (CDN)

Easily import the most popular JavaScript and CSS libraries: Bootstrap 5.3 (responsive CSS framework), jQuery 3.7 (simplified DOM manipulation), Font Awesome 6 (5000+ icons), Animate.css (CSS animations), Chart.js 4 (interactive charts). Our HTML editor with libraries automatically loads corresponding CDN files into your preview. No more searching for CDN URLs or typing them manually.

Integrated Development Tools

JavaScript Console for Debugging

Our HTML playground with console automatically captures all console.log(), console.error(), console.warn() and console.info() messages from your JavaScript code and displays them in an integrated console below the preview. No need to open browser DevTools to debug your code. JavaScript errors are also intercepted and displayed in red in the console, making it easier to identify and fix bugs.

Responsive Preview (Desktop/Tablet/Mobile)

Test your design's responsiveness with our integrated device simulator. Click on Desktop (100% width), Tablet (768px) or Mobile (375px) icons to see how your page displays on different screen sizes. Essential for checking CSS media queries, Bootstrap breakpoints, and ensuring optimal user experience across all devices.

Export and Save

Our HTML editor with export lets you download your work as a complete .html file including HTML, CSS (in a <style> tag) and JavaScript (in a <script> tag). Click "Export" to generate and download a standalone HTML file usable directly on your web server or locally. You can also import an existing .html file ("Import" button) to edit it in the editor.

Auto-save localStorage

The auto-save system automatically saves your code to browser localStorage every few seconds. If you accidentally close the tab or refresh the page, your work is preserved and will automatically reload on your next visit to the editor. You can also save manually (Ctrl+S or Save button) and restore previous versions (Load button).