Learn Vocabulary While Watching YouTube
AI-powered Chrome extension that overlays YouTube subtitles with word-level precision. Transform your video watching into an immersive learning experience.
Free to use • 10 subtitle fetches/day • 50 AI analyses/month
Demo Video Placeholder
Replace with actual demo
How It Works
Start learning vocabulary in just 4 simple steps
Watch YouTube
Open any YouTube video and enable the Vocaminary overlay with one click.
Click Any Word
Click on any word in the subtitle overlay to see instant AI-powered analysis.
Get AI Analysis
Receive context-aware definitions, pronunciation, synonyms, and translations instantly.
Review Dashboard
Access all your saved words in the web app, synced across all your devices.
What Makes Vocaminary Different
Powerful features designed to make vocabulary learning effortless
All-in-One Tooltip
Get definitions, synonyms, pronunciation, Google search, word translation, and sentence translation—all without leaving the page.
Context-Aware Definitions
Word meanings based on sentence context, with definitions tailored to your language level for better understanding.
Smart Highlighting
Saved words are automatically highlighted across all subtitles, making it easy to spot and review vocabulary you're learning.
Cloud Sync
Instantly sync your saved words with the web app. Access your vocabulary from mobile, tablet, or laptop seamlessly.
Recent Subtitles History
Quick access to previously viewed captions, making it easy to review and revisit content you've watched.
Smooth User Experience
Fast, intuitive interface designed for seamless learning without interrupting your viewing experience.
Privacy & Flexibility
Use your own OpenAI API key for complete control and privacy. Your data, your choice.
Multi-Language Support
Currently supports English captions with more languages coming soon. Perfect for language learners worldwide.
Open Source
Community-driven development with regular updates and new features. Contribute and help shape the future of Vocaminary.
Simple, Transparent Pricing
Start free and unlock more features as you learn
Free Tier
Perfect for casual learners
- 10 new subtitle fetches/day
- Previously cached subtitles: unlimited & free
- 50 AI analyses/month
- Unlimited word saves
- Personal API key support
- Web app sync
Early Adopter
For those who join us early
- 100 AI analyses (first month)
- 10 new subtitle fetches/day
- Previously cached subtitles: unlimited
- Unlimited word saves
- Personal API key support
- Web app sync
- Priority support
Active Early Adopter
5+ days usage + 20+ words saved
- 200 AI analyses/month
- 20 new subtitle fetches/day
- Previously cached subtitles: unlimited
- Unlimited word saves
- Personal API key support
- Web app sync
- Priority support
- Exclusive features early access
All plans include access to the web app and cloud sync. Learn more about pricing
Start Learning Vocabulary Today
Join thousands of language learners transforming YouTube into their personal vocabulary classroom. Install Vocaminary now and make every video a learning opportunity.
Free to start • No credit card required • 5-minute setup