SubLingo translates subtitles in real-time, lets you hover any word for instant definitions, and builds your vocabulary — all without leaving your video.
A complete language learning toolkit that works right inside your favorite streaming platforms.
See original and translated subtitles simultaneously. Synced in real-time with word-level accuracy.
Hover any word in the subtitles for instant translation, pronunciation, and part of speech.
Save words with one click. They appear in your personal vocabulary list with context sentences.
Built-in flashcard system using SM-2 algorithm. Review words at scientifically optimal intervals.
Export your vocabulary to Anki decks. TSV, APKG, and AnkiConnect direct sync supported.
All data stays on your device. No accounts required. No tracking, no ads, no data selling.
Add SubLingo to Chrome, open any video on YouTube or Netflix, and subtitles are automatically detected and translated.
Hover any word to see instant translations with pronunciation. Click to save it to your personal vocabulary list.
Open the side panel to review your saved words with spaced repetition flashcards. Export to Anki anytime.
Native integration with the biggest streaming platforms. More coming soon.
Live
Full support including YouTube Shorts, live streams, embeds, and auto-generated captions.
Live
Works with Netflix's TTML subtitle format. DOM-based extraction for maximum reliability.
Coming Soon
Disney+ adapter is in development with full WebVTT subtitle support.
Coming Soon
Generic HTML5 adapter for Coursera, Udemy, and any site with standard video players.
Install SubLingo for free. No account required. Your data never leaves your device.
Chrome Web Store | Manifest V3 | Works offline