Understand foreign-language live streams and videos without subtitles: what’s said becomes captions in your language, as they speak.
Users
9
store count
Rating
5.0 / 5
unchanged in 30 days
Ratings
3
total ratings
Store rank
#207K
#174K among extensions
Version
2.3.0
updated 21 Oct 2026
About LumaSub: Live Speech-to-Subtitle Translator
Live streams in a language you don't speak, videos with no subtitles: now you can follow along as you watch.
Highlights
✅ One click to start: Press once and it translates.
✅ Live captions: There the moment someone speaks.
✅ Precise mode: Captions appear right as words are spoken.
✅ Chat translation (new): Understand the live chat, too.
✅ Both languages: Translation and original together.
✅ Catch what you missed: The Reading panel keeps every line.
✅ Knows who's talking: See who said what.
✅ Captions your way: Size, position, opacity.
✅ Three paces: Fast, Medium or Slow.
✅ Captions count only sound: Pauses and silence are free.
✅ Private: No recording, nothing saved.
✅ Many languages: Any language, translated into yours.
✅ Help in one click: Hit a snag? Write to us.
Plans
New accounts get a free 15-minute trial, usable in Instant mode, Precise mode and chat translation.
Monthly: USD 14.99 for 30 hours of Instant captions a month (renews automatically, cancel anytime).
Time packs: 5 hours USD 4.99 | 15 hours USD 12.99 (also measured in Instant captions, never expire).
Precise mode counts 1 minute watched as 2 minutes; chat translation is charged by the amount of chat, so more messages use it faster.
Prices exclude tax. Refundable within 14 days of purchase if unused.
Notes
Payments are handled by Lemon Squeezy (Lumenhouse Studio), not sold by Google.
Terms: https://lumasub.web.app/terms.html