HTML Editor Documentation
About This Tool
This is a powerful online HTML editor with live preview functionality. You can write HTML, CSS, and JavaScript in separate panels and see the results in real-time. Perfect for rapid prototyping, learning web development, and testing small code snippets.
Features
- Separate Panels: Write HTML, CSS, and JavaScript in dedicated editor panels
- Live Preview: See your changes instantly in the preview pane as you type
- Auto-save: Your code is automatically saved to browser's local storage
- Code Formatting: Format your code with proper indentation
- Responsive Preview: Test how your page looks on different screen sizes
- Download: Export your complete HTML file with embedded CSS and JavaScript
- Syntax Highlighting: Beautiful code highlighting with the Dracula theme
How to Use
1. Write HTML: Use the HTML panel to structure your content
2. Add Styles: Write CSS in the CSS panel to style your page
3. Add Interactivity: Use JavaScript in the JS panel for dynamic behavior
4. Preview: Watch the live preview update in real-time
5. Run: Click the Run button or use keyboard shortcut to manually refresh
6. Download: Export your work as a complete HTML file
Keyboard Shortcuts
Ctrl/Cmd + S - Save/Download HTML
Ctrl/Cmd + Enter - Run Code
Ctrl/Cmd + Shift + F - Format Code
Ctrl/Cmd + / - Toggle Comment
Tips & Tricks
- Use the "Insert Template" buttons to quickly add boilerplate code
- The auto-save feature ensures you never lose your work
- Test responsive design using the device toggle buttons in preview
- Open in new tab to see your page without any editor chrome
- CSS written in the CSS panel is automatically injected into the <style> tag
- JavaScript from the JS panel is automatically placed in the <script> tag
Technical Details
This editor uses CodeMirror for syntax highlighting and code editing. The preview is rendered in a sandboxed iframe for security and isolation. All code is stored locally in your browser using localStorage, ensuring privacy and persistence.