Real-Time Preview

See your HTML code rendered instantly as you type or upload. No delays, no page refreshes—just immediate visual feedback for rapid development.

Responsive Testing

Test how your HTML appears on desktop, tablet, and mobile devices. Switch between viewport sizes with a single click to ensure perfect responsiveness.

Code Beautification

Transform messy, unformatted HTML into clean, properly indented code. Our beautifier makes your code readable and maintainable in seconds.

Code Minification

Reduce file size by removing unnecessary whitespace and comments. Perfect for optimizing HTML before deployment to production environments.

Code Analytics

Get detailed statistics about your HTML code including character count, line numbers, word count, and estimated file size for better optimization.

Client-Side Processing

All processing happens in your browser. Your HTML code never leaves your device, ensuring complete privacy and security for sensitive projects.

An HTML viewer is a web-based tool that allows you to view, edit, and render HTML code in real-time. It works by parsing your HTML code and displaying the rendered output in a preview pane. Our HTML viewer processes everything client-side in your browser using JavaScript, meaning your code never leaves your device. You can upload HTML files, paste code directly, or load content from a URL. The tool supports features like code beautification, minification, responsive testing, and instant preview updates, making it perfect for developers, designers, and anyone working with HTML content.

Yes, your HTML code is completely secure. All processing happens entirely within your web browser using client-side JavaScript. Your code is never uploaded to any server or transmitted over the internet (except when you explicitly choose to load content from a URL). This means your sensitive or proprietary HTML code remains private and secure on your device. The tool uses sandboxed iframes for rendering, which provides an additional layer of security by isolating the preview environment from the main page.

Absolutely! Our HTML viewer fully supports HTML files that include embedded or inline CSS and JavaScript. You can view complete web pages with styling, animations, interactive elements, and dynamic functionality. The viewer renders everything in a sandboxed iframe that allows scripts to run safely while maintaining security. This makes it ideal for testing complete web projects, troubleshooting layout issues, or previewing HTML email templates with full styling.

Beautify formats your HTML code with proper indentation, line breaks, and spacing to make it more readable and maintainable. It's perfect for reviewing code or preparing it for collaborative development. Minify does the opposite—it removes all unnecessary whitespace, line breaks, and comments to reduce file size. Minified code is ideal for production environments where smaller file sizes lead to faster page load times. Use beautify during development and minify before deploying to production.

Testing responsive design is easy with our preview size selector. After loading your HTML code, use the "Preview Size" dropdown menu to switch between Desktop (100% width), Tablet (768px), and Mobile (375px) viewport sizes. The preview iframe will automatically resize to match the selected viewport, allowing you to see exactly how your HTML content will appear on different devices. This is particularly useful for testing media queries, flexible layouts, and ensuring your content is mobile-friendly without needing multiple physical devices.

Yes! The tool provides multiple options for saving your work. Use the "Download" button to save the current HTML code as a .html file to your computer. You can also use the "Copy Code" button to copy the formatted HTML to your clipboard, which you can then paste into your preferred code editor or text file. Both options work with beautified, minified, or original code, giving you complete flexibility in how you export and use your HTML content.

🎓 Learning & Education

Perfect for students learning HTML, web development courses, and coding bootcamps. See immediate results as you practice HTML syntax, experiment with different elements, and understand how HTML structures web pages.

💼 Professional Development

Web developers can quickly test HTML snippets, debug layout issues, and prototype new features without setting up a full development environment. Ideal for rapid experimentation and client demonstrations.

📧 Email Template Design

Design and test HTML email templates before sending. Preview how your emails will appear across different viewport sizes and ensure all styling is properly inline for maximum email client compatibility.

🔍 Code Review & Debugging

Paste problematic HTML code to visualize issues, identify syntax errors, and test fixes in real-time. The beautify feature makes it easier to spot structural problems in poorly formatted code.

📱 Mobile Optimization

Test and optimize HTML content for mobile devices. Ensure text is readable, buttons are tap-friendly, and layouts adapt gracefully to smaller screens using the responsive preview modes.

🎨 Design Prototyping

Designers can create HTML prototypes to demonstrate layouts, test color schemes, and validate design concepts before full implementation. Share the "Open in New Tab" link with stakeholders for feedback.