Subturtle: Learn English with Subtitles, Videos & AI Coach

Tracking since Apr 1, 2026.

Changelog

• Jun 12, 2026
  description

  Learn English While You Read and Stream
  
  Stop switching between study apps and the things you actually enjoy. Subturtle turns the time you already spend online into effortless language practice — on YouTube, Netflix, Wikipedia, articles, blogs, and anywhere else you read or watch. It transforms your everyday content into your personal learning companion, helping you understand real-life English in context — without ever opening a textbook.
  
  Learning should fit your routine, not interrupt it.
  
  Three Ways to Capture Words
  
  1. Watch and learn (YouTube & Netflix). Turn on subtitles, then hover any word for an instant translation and definition:
  - Single word: just hover.
  - Multiple words: hold Ctrl (⌘ on Mac) and drag to select the phrase. The translation appears right where you need it.
  
  2. Read and learn (any website). Highlight any text on Wikipedia, an article, a blog, your favorite forum — anywhere. A floating Subturtle icon appears with the translation, ready to save with one click. Don't want it on a particular site? Toggle it off per-domain from the popup.
  
  3. Translate on demand (the toolbar popup). Click the Subturtle icon, paste or type any phrase, and get an instant detailed translation. Perfect for quick lookups while you're reading anywhere — even a paper book.
  
  Your Learning Toolkit:
  - Understand instantly: Quick translations for single words or whole phrases in your native language.
  - Go deeper: Detailed definitions, parts of speech, and real example sentences — without ever leaving the page.
  - Build your library: Save any phrase to a custom bundle to review later.
  - Practice with confidence: Open your dashboard to review your saved vocabulary, run flashcard sessions, and chat with your AI Coach to master what you've learned.
  - Subturtle works with 100+ target languages — pick yours from the popup.
  
  Ready to turn captions and pages into conversations? Add Subturtle and start learning the natural way.

  Subturtle turns the videos and web pages you already enjoy into an easy way to learn English.
   
  When you meet a word you don't know, you don't stop, open a new tab, or lose the moment. The meaning shows up right where you are. You save the words that matter to you, and Subturtle helps you practice them until they stay.
   
  What you can do:
   
  • Understand any word while you watch
  Hover or tap a word on a video subtitle and its meaning appears right on the screen — no pausing, no second tab. Works while you watch on YouTube and Netflix.
   
  • Real meaning, saved in one tap
  See more than a quick translation. Subturtle shows how the word is really used, with a clear example — then you keep it in one tap and build your own word collections (bundles).
   
  • Learn from any web page
  Reading an article, a blog, or any site? Highlight the text to understand it and save it — not just video.
   
  • Bring words back with Smart Review
  Subturtle shows each saved word again at the right time. Easy words come back less often; harder words come back more. This spaced way to review helps them actually stick.
   
  • Speak English with your AI Coach
  Practice out loud with a friendly AI coach. It can help in your own language first, then guide you to speak in English — so speaking feels easier and less scary.
   
  Made for your language
  Subturtle is for people learning English who want it to fit into their day. It helps speakers of many languages — Spanish, French, Portuguese, Japanese, Persian, and more.
   
  Add Subturtle, keep watching and reading what you love, and let your English grow a little every day.

• Jun 12, 2026
  short_description

  Turn video subtitles into English lessons. Learn new vocabulary in context as you watch on YouTube and Netflix.

  Learn English from any video or web page: tap a subtitle word for its meaning, save and review words, and speak with an AI coach.

• Jun 12, 2026
  name

  Subturtle

  Subturtle: Learn English with Subtitles, Videos & AI Coach

• May 8, 2026
  description

  Learn English While You Stream
  Stop switching between study apps and your favorite shows. Subturtle turns the time you already spend on platforms like YouTube and Netflix into an effortless language-learning experience. It transforms video subtitles into your personal learning companion, helping you understand real-life English in context—without ever opening a textbook.
  
  Learning should fit your routine, not interrupt it.
  
  How It Works
  It's simple. Open a video on a supported platform, switch on the subtitles, and let your curiosity lead the way.
  
  - For a single word: Just hover your mouse over it to see an instant translation and definition.
  
  - For multiple words:
  1. Press and hold Ctrl (on Windows) or ⌘ Command (on Mac).
  2. Click and drag to select the phrase you want to understand.
  3. The translation will appear right where you need it.
  
  Your Learning Toolkit
  Understand Instantly: Get quick translations for single words or entire phrases in your native language.
  
  - Go Deeper: View detailed definitions and parts of speech without ever leaving your video.
  - Build Your Library: See a word you want to remember? Save it to a custom bundle for later.
  - Practice with Confidence: Head to your dashboard to review your saved vocabulary and chat with - - your AI Coach to master what you've learned.
  
  Ready to turn captions into conversations? Add Subturtle and start learning English the natural way.

  Learn English While You Read and Stream
  
  Stop switching between study apps and the things you actually enjoy. Subturtle turns the time you already spend online into effortless language practice — on YouTube, Netflix, Wikipedia, articles, blogs, and anywhere else you read or watch. It transforms your everyday content into your personal learning companion, helping you understand real-life English in context — without ever opening a textbook.
  
  Learning should fit your routine, not interrupt it.
  
  Three Ways to Capture Words
  
  1. Watch and learn (YouTube & Netflix). Turn on subtitles, then hover any word for an instant translation and definition:
  - Single word: just hover.
  - Multiple words: hold Ctrl (⌘ on Mac) and drag to select the phrase. The translation appears right where you need it.
  
  2. Read and learn (any website). Highlight any text on Wikipedia, an article, a blog, your favorite forum — anywhere. A floating Subturtle icon appears with the translation, ready to save with one click. Don't want it on a particular site? Toggle it off per-domain from the popup.
  
  3. Translate on demand (the toolbar popup). Click the Subturtle icon, paste or type any phrase, and get an instant detailed translation. Perfect for quick lookups while you're reading anywhere — even a paper book.
  
  Your Learning Toolkit:
  - Understand instantly: Quick translations for single words or whole phrases in your native language.
  - Go deeper: Detailed definitions, parts of speech, and real example sentences — without ever leaving the page.
  - Build your library: Save any phrase to a custom bundle to review later.
  - Practice with confidence: Open your dashboard to review your saved vocabulary, run flashcard sessions, and chat with your AI Coach to master what you've learned.
  - Subturtle works with 100+ target languages — pick yours from the popup.
  
  Ready to turn captions and pages into conversations? Add Subturtle and start learning the natural way.

• May 8, 2026
  host_permissions

  https://www.subturtle.app/, https://www.dashboard.subturtle.app/, https://translation.googleapis.com/, https://api-js.mixpanel.com/, https://ipapi.co/json/

  <all_urls>, https://www.subturtle.app/, https://www.dashboard.subturtle.app/, https://translation.googleapis.com/, https://api-js.mixpanel.com/, https://ipapi.co/json/

Permissions & access

Permissions

activeTabtabsstorageidentity

Host access

<all_urls>, https://www.subturtle.app/, https://www.dashboard.subturtle.app/, https://translation.googleapis.com/, https://api-js.mixpanel.com/, https://ipapi.co/json/

Screenshots

Similar extensions

Alternatives to Subturtle: Learn English with Subtitles, Videos & AI Coach, ranked by description similarity.

SubLearning

Learn English with YouTube Subtitles

124

Translate Netflix Subtitles

Subtitle Translator for Netflix, YouTube, Coursera, Udemy, Amazon Prime Video, and more platforms.

9.0K

★ 4.0

SubMerge

Hover over subtitle words to translate them instantly. Build vocabulary while watching.

3

★ 1.0

Adaptive Netflix Subs

Adaptive Subs for Netflix: Master Languages as You Watch

56

★ 4.0

Subsentio - Double Subtitles for YouTube

Double subtitles on YouTube: learn languages, train words with translations, personal dictionary, and instant stats.

92

★ 3.7

Subtitle Learning Assistant

Capture subtitles while watching foreign videos, click to translate, and build your vocabulary

30

LWR Interactive Subtitles (beta)

Premium translation tool for Netflix.

6

Dual Subtitles & AI Translation - InterSub

Use dual subtitle AI translation dualsub for language learning, immersive translate meaning of words: Spanish to English to Japanese

20.0K

★ 4.6