Vocaminary

Learn languages naturally on YouTube. Word-perfect subtitles with instant AI definitions for every word you click.

### Overview Vocaminary is a powerful English learning tool that transforms YouTube captions into an interactive vocabulary builder. It displays video captions word-by-word, perfectly synchronized with speech. Click any word for AI-powered definitions and translations into your native language, and save words for later review. **Currently supports:** English video captions (Spanish, French, and other languages coming soon!) **Translates to:** Any language - get definitions in your native language ### ✨ Key Features **🧠 AI-Powered English Learning** - Click any word for instant, context-aware definitions - Smart translations into your native language based on sentence context - Definitions adapted to your English level (beginner to advanced) - Translate both individual words and full sentences - Works with English videos now (Spanish, French, and more languages coming soon) **📚 Save & Review Vocabulary** - Save English words directly from video captions - Highlight saved words across all videos for instant recognition - Build your personal vocabulary list while watching - Review and track your learning progress **🎯 Word-Level Precision** - Captions appear exactly when each word is spoken - Natural speech timing with intelligent synchronization - No more awkward caption blocks that appear too early or late - Works with both auto-generated and manual YouTube captions **⚡ Lightning-Fast Performance** - 3-layer intelligent caching system (Memory → IndexedDB → Server Cache) - Previously watched videos load captions in under 50ms - Smart rate limiting prevents API blocks **🎨 Seamless Integration** - Clean overlay on YouTube player - Auto-disable when switching videos - One-click enable/disable button - Non-intrusive design that enhances, not distracts **🔐 Privacy-Focused** - All data processing happens locally in your browser - No tracking or analytics - Minimal data collection (see privacy policy) - Open source for full transparency ### 🎓 Perfect For - **English Learners**: Build vocabulary while watching your favorite YouTube content - **Students**: Study English with context-aware definitions and translations - **Intermediate Learners**: Move beyond textbooks with real-world English - **Visual Learners**: See words highlighted as they're spoken - **Anyone**: Improve English comprehension through immersive video content ### 🚀 How to Use 1. Navigate to any English YouTube video with captions 2. Look for the "Enable Overlay" button on the video player 3. Click the button to activate word-by-word captions 4. Watch as captions sync perfectly with speech 5. Click any word to see its definition and translation in your language 6. Save words to your vocabulary list for later review 7. Click the button again to disable when switching videos **First-time use**: The first video may take 2-5 seconds to fetch captions. After that, they're cached for instant loading! ### 📊 Technical Highlights - Built with vanilla JavaScript (no frameworks) - Chrome Manifest V3 compliant - Efficient memory usage - No external dependencies - Regular updates and improvements ### 🔒 Privacy & Security - Minimal permissions (only what's needed) - No personal data collection - No browsing history tracking - Secure HTTPS connections only - Full privacy policy available ### 🆘 Support - GitHub Repository: https://github.com/Aminophen98/Vocaminary - Issues & Bug Reports: https://github.com/Aminophen98/Vocaminary/issues - Email: aminophendev@gmail.com ### 📝 Permissions Explained - **activeTab**: Detect when you're on a YouTube video page - **storage**: Save settings and cached subtitles locally - **scripting**: Inject the subtitle overlay into YouTube pages - **nativeMessaging**: Future feature support ### 🌟 Coming Soon - Support for more source languages (Spanish, French, German, Japanese, etc.) - Export vocabulary lists to Anki, CSV, or PDF - Customizable caption appearance (font, size, colors) - Spaced repetition flashcards for saved words - Progress tracking and learning analytics - More features based on your feedback!