Copy4LLM

A powerful Chrome extension that intelligently extracts and converts web content into clean, LLM-optimized markdown format.

Perfect for feeding web content to ChatGPT, Claude, or any other AI language model.

• 🎯 Smart Content Extraction - Advanced scoring algorithm identifies main content while filtering out ads, navigation, and clutter
• 📝 Markdown Conversion - Converts HTML to clean, properly formatted markdown
• ⚡ Multiple Access Methods - Right-click context menu and keyboard shortcut (Ctrl+Shift+C)
• 📌 Selection Support - Works with selected text or entire pages
• 🔗 Context Preservation - Automatically includes page title and URL for better AI context
• 🚀 Performance Optimized - Smart caching and robust clipboard handling
• 🎨 Clean Output - Removes excessive whitespace, normalizes formatting, and optimizes for LLM consumption

1. Clone or download this repository
2. Open Chrome and navigate to chrome://extensions/
3. Enable Developer mode (toggle in top-right corner)
4. Click "Load unpacked" and select the project folder
5. Start using - right-click on any webpage and select "Copy4LLM"

Right-click method:

• Navigate to any webpage
• Right-click anywhere (or select text first for partial extraction)
• Choose "Copy4LLM" from the context menu
• Clean markdown is automatically copied to your clipboard

Keyboard shortcut:

• Press Ctrl+Shift+C (or Cmd+Shift+C on Mac) on any webpage
• Full page content is processed and copied as markdown

1. Content Detection - Intelligent scoring system analyzes page structure to identify main content
2. Smart Cleanup - Removes ads, navigation, scripts, and other non-essential elements
3. Markdown Conversion - Leverages Turndown.js for high-quality HTML-to-markdown conversion
4. Content Optimization - Normalizes formatting, removes excessive whitespace, and structures output for LLM consumption
5. Context Enhancement - Automatically includes page metadata (title, URL) for better AI understanding
6. Robust Clipboard Handling - Multiple fallback methods ensure reliable copying across different environments

copy4llm/
├── manifest.json          # Extension configuration (Manifest V3)
├── background.js          # Service worker - context menu & messaging
├── content.js            # Content extraction & processing logic
├── popup.html            # Extension popup interface
├── libs/
│   └── turndown.js       # HTML to Markdown converter library
└── icons/                # Extension icons (16px, 32px, 48px, 128px)

• Google Chrome browser
• Basic knowledge of JavaScript and Chrome Extensions

1. Clone this repository
2. Open Chrome and navigate to chrome://extensions/
3. Enable "Developer mode"
4. Click "Load unpacked" and select the project directory
5. Make your changes and click the refresh icon to reload

• content.js - Modify content extraction logic and selectors
• background.js - Update context menu behavior and messaging
• manifest.json - Configure permissions and extension metadata

Edit the selector arrays in content.js to customize extraction:

const USELESS_SELECTORS = [
  // Add selectors for elements to remove
  '.advertisement', '.popup', '.cookie-banner'
];

const CONTENT_SELECTORS = [
  // Add selectors for main content detection
  'article', 'main', '.content', '.post'
];

1. Prepare Package

   • Test thoroughly across different websites
   • Create store listing screenshots
   • Write compelling description

2. Developer Account

   • Visit Chrome Web Store Developer Dashboard
   • Pay one-time $5 registration fee

3. Upload & Submit

   • Create ZIP file (exclude README.md)
   • Upload via developer dashboard
   • Complete store listing information
   • Submit for review (typically 1-3 business days)

Contributions are welcome! Please feel free to submit a Pull Request. For major changes, please open an issue first to discuss what you would like to change.

1. Fork the repository
2. Create your feature branch (git checkout -b feature/AmazingFeature)
3. Commit your changes (git commit -m 'Add some AmazingFeature')
4. Push to the branch (git push origin feature/AmazingFeature)
5. Open a Pull Request

This project is licensed under the MIT License - see the LICENSE file for details.

• Turndown.js - Excellent HTML to Markdown converter
• Chrome Extensions team for comprehensive documentation and APIs