Watch foreign content,
actually learn the language.
Dual subtitles, easy word lookups, and AI-powered phrase and sentence explanations — right in your browser.
Available on
Chrome 
Firefox Available on
Three steps from install to fluent
No setup pain. No textbooks. Just watch what you already watch.
Install the extension
One click from Chrome or Firefox. No account required to try it.
Watch your shows
Open any video on supported platforms with subtitles. Dual captions appear in any language pair.
Learn as you go
Look up words, explore expressions, and track what you've mastered from your account dashboard.
Everything you need to learn as you watch
Built for people who want to actually absorb the language, not just read a translation and move on.
Dual subtitles
Original and translated captions at the same time. On YouTube, words highlight as they're spoken for follow-along.
Hover translation
Hover over any word for a quick translation. See alternative meanings for ambiguous words.
Word & phrase lookup
Click a word or select a phrase for a detailed translation popup.
AI vocab cards
Save a word and an AI generates a full study card: lemma, part-of-speech, every inflection, multiple senses with example sentences.
Expression learning
AI spots expressions inline and explains them in your native language. Save them to your library; mark them learned once they click.
Lookup library
Every word and phrase you save, organized by language and part of speech.
Study mode
Gap-fills, matching, and drag-to-reorder quizzes built from words you actually encountered. No flashcards to maintain.
70+ languages
Watch in any of 70+ supported languages, with translation into your native language of choice.
Stop looking up every word.
We explain it inline.
Hover any word for an instant translation. Click or highlight for a detailed lookup. Expressions get highlighted as they appear in captions — until you mark them as learned. One click for an explanation in your native language.
Watch what you love.
Learn what you watch.
Start free. Upgrade when you want AI-powered learning.
Free
Start watching smarter — no account needed.
$0/ month
- Dual Subtitles
- Machine Translations
- Word & Phrase Translations
- Word Hover translations
- Keyboard shortcuts
Basic
For near-proficient speakers who need a little support.
$4.92 / month
- Everything in Free
- AI Translations
- Save Your Words & Phrases
- Word Forms & Example Sentences
- Expression Explanations
- 2,500 credits / month
Pro
For casual-to-intermediate learners learning a new language.
$9.50 / month
- Everything in Basic
- 15,000 credits / month
Backer
For ambitious learners with the time to commit.
$18.99 / month
- Everything in Pro
- 40,000 credits / month
- Influence the roadmap
Ready to watch smarter?
Install SubText and get dual subtitles on your next video.
Available on
Chrome Firefox