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Subtitles for Language Learning Chrome Extension: 5 Picks
The best subtitles for language learning Chrome extension depends on where you watch. Language Reactor is the pick for Netflix and YouTube study with flashcard export. Trancy suits you if you also wat...
The best subtitles for language learning Chrome extension depends on where you watch. Language Reactor is the pick for Netflix and YouTube study with flashcard export. Trancy suits you if you also watch Disney+, Prime Video or online courses and want AI help. Sabi fits learners who want exercises and auto-pause across five streaming services. Funlingo is the choice if you want dual subtitles at no cost. If you learn mostly by talking, SidebySpeak does the same job for live calls.
Native subtitles show one language. You either read your own language and stop listening, or you switch them off and lose the plot. Two captions on screen at once, your target language and your native one, fix that. A click-to-translate dictionary saves you from pausing to search every word. The catch is that extensions differ a lot in which streaming sites they support, how reliable the translation is, and what you can do with the words you save.
This article compares five options by how they work, who they suit and what they cost. We build SidebySpeak, so it comes first. It is built for live meeting calls, not for streaming, and we say so plainly. The other four are streaming tools. You will also get a side-by-side table and a simple routine for studying with dual subtitles.
1. SidebySpeak
SidebySpeak is the right pick when your target language lives in conversations, not in shows. It captions calls in a browser tab. It does not caption Netflix episodes, so treat it as a speaking companion to a streaming extension.
How it works
You install the Chrome or Edge extension, sign in and press Start on a browser call on Google Meet, Zoom, Microsoft Teams or another browser platform. It shows the original speech next to its translation, for the tab audio and optionally your own microphone, across 60 languages. No meeting bot joins, so nobody has to approve anything.
- Learn mode highlights matching words live between the speech and its translation.
- Optional AI flashcards can be generated from your calls.
- Transcripts can be saved, downloaded or emailed to you.
- Saved transcripts stay in your browser profile, not on company servers.
Dual captions work as well on a live conversation as on a TV episode, and nobody else on the call has to notice.
Who it suits and what it costs
Think language exchange partners, tutor sessions, and anyone who works with colleagues in another language. Learn mode lets you study vocabulary from real speech instead of scripted dialogue. It is the wrong tool if all you want is subtitles on a streaming show.
The free plan gives you 20 minutes a month with no card, enough for two 10-minute trial chats. Paid plans are Basic at $9.99 for 10 hours, Pro at $20 for 25 hours and Power at $30 for 50 hours. Every plan includes all languages and Learn mode. Three 30-minute calls a week is about 360 minutes a month, well inside Basic's 600. Tab and microphone together count as one minute.
2. Language Reactor
Language Reactor, formerly called Language Learning with Netflix, is the strongest all-round choice if you study on Netflix and YouTube and want subtitles that turn into review material.
How it works
It adds dual subtitles to Netflix and YouTube and lets you click any word for a popup dictionary entry. You can step through the video one subtitle line at a time and replay a sentence until you catch it. Saved words can be exported, which is its biggest advantage over simpler tools.
- Dual subtitles with a popup dictionary
- Word highlighting by how common each word is
- Sentence-by-sentence navigation
- Export to Anki or CSV
If you already review vocabulary in Anki, Language Reactor is the one that fits that workflow.
Who it suits and what it costs
Intermediate learners and Anki users get the most from it. It runs on desktop only, so you will not use it on a phone. Beginners may find the busy interface harder to settle into than a lighter tool.
The core features are free, with a paid Pro tier above them. Coverage is the main limit. Among the major services it handles Netflix and YouTube, so check your own streaming habits first. Translation is automatic, so treat idioms and slang with some caution and confirm odd lines against the official subtitle.
3. Trancy
Trancy is the pick when you split your time between several video sites and want AI explanations on top of subtitles. It has the widest platform list here.
How it works
Trancy shows bilingual subtitles on YouTube, Netflix, Disney+ and Prime Video, plus course sites such as Udemy and Coursera. You save words with one click, and AI can break a sentence into parts of speech and structure. Saved words go into a flashcard system with Anki sync, according to its developer.
- Bilingual subtitles across streaming and course platforms
- Several viewing modes, including a reading-style layout
- AI grammar breakdown for individual sentences
- Flashcards with spaced repetition
Trancy earns its place when you want one extension for streaming, lectures and web pages.
Who it suits and what it costs
Learners who study from both entertainment and online courses benefit most. The grammar breakdown also helps if you keep asking why a sentence is built the way it is. Trancy is available for several browsers, not just Chrome.
There is a free tier, and Trancy states it caps AI-transcribed videos at 40 a day. Premium plans remove limits and add features. The AI-generated subtitles can miss slang and cultural nuance, so check idioms against an official subtitle track. Think of the grammar help as a prompt for your own thinking, not a final authority.
4. Sabi
Sabi is the best fit if you want exercises and automatic pausing, or if you watch on Prime Video or Rakuten Viki, which many competitors skip.
How it works
Sabi gives you dual subtitles on Netflix, YouTube, Disney+, Prime Video and Rakuten Viki, according to its developer. Hover over a word to see a translation, pronunciation and example sentences. Its AI subtitles are generated from the audio itself, so they match what is actually spoken, which helps with dubbed shows where the official subtitles are rewritten.
- Dual subtitles and word hovering
- Audio-based AI subtitles for mismatched or dubbed content
- Auto-pause after each subtitle line
- Speaking, listening and vocabulary exercises
When official subtitles do not match the audio, subtitles generated from the audio are what keep your listening practice honest.
Who it suits and what it costs
Beginners get the most from auto-pause, because it gives you time to process each line. It also suits anyone watching dubbed series, anime or K-dramas, where mismatched subtitles are common. The exercises add structure if passive watching has stopped working for you.
The extension is free to add to Chrome, with paid tiers for heavier features. Test the free version on your own show before paying. The platform list comes from the developer, so confirm your streaming service on the store page before you commit. It is also a newer tool than Language Reactor, so expect fewer years of community feedback.
5. Funlingo
Funlingo is the budget pick. Its developer describes it as a completely free Chrome extension with dual subtitles on Netflix, YouTube and Amazon Prime Video.
How it works
Like any dual-subtitle tool, it adds a second subtitle line to the video player, so you read the target language and your own language together. Do not assume extras beyond that. Open the store page and test these on one episode before you rely on it.
- Click-to-translate on a word
- A way to save words for later
- Subtitle size and position settings
- Whether your streaming service is supported
A free tool is only a bargain if it does the one thing you need, so test that on one episode first.
Who it suits and what it costs
It suits curious beginners and casual learners who want to try dual subtitles without paying. It also works as a low-risk comparison point against a paid tool. If Prime Video is your only service, a dedicated Prime Video extension also exists that shows foreign-language subtitles with a dictionary.
The cost is free, so the trade-off is usually depth. Free tools often lack exercises or built-in flashcards. If you pick one, pair it with a flashcard app and a weekly review habit. You can still add a second extension later without losing anything.
Comparing the five and studying with two captions
Pick by platform first, then by what you want beyond subtitles. Only after that does price matter. Study habits matter more than the extension you choose.
Side-by-side comparison
The table puts the main differences in one place. Platform lists come from each developer, so confirm yours on the store page.
| Tool | Best for | Platforms | Cost |
|---|---|---|---|
| SidebySpeak | Live conversation practice | Google Meet, Zoom, Teams, other browser calls | Free 20 min/month, paid from $9.99 |
| Language Reactor | Netflix and YouTube study, Anki | Netflix, YouTube | Free core, paid Pro |
| Trancy | Many platforms, AI grammar | YouTube, Netflix, Disney+, Prime Video, Udemy, Coursera | Free tier, paid premium |
| Sabi | Exercises, auto-pause, dubs | Netflix, YouTube, Disney+, Prime Video, Viki | Free to install, paid tiers |
| Funlingo | Free dual subtitles | Netflix, YouTube, Prime Video | Free |
If none of these fits, InterSub is another dual-subtitle and translator extension for Chrome worth testing. Install only from the Chrome Web Store and read the permissions before you accept them. Streaming sites change their pages often, so an extension that works today can break after an update.
Choose the extension that supports the service you already watch most, because the best tool is the one you open every day.
How to study with two captions
Dual subtitles help only if you use them as a ramp, not a crutch.
- Pick a show slightly below your level, with clear speech.
- Start with both captions on, reading the target-language line first.
- Pause on a line you missed, click the unknown word and save it.
- Rewatch the scene with only the target-language subtitle.
- After a few weeks, switch off the native line for easier episodes.
- Review your saved words the next day, not the next month.
Keep sessions to 20 or 30 minutes and save five to ten words, not fifty. A short, repeated habit beats an occasional binge.
Pick one and start watching
If you watch Netflix and YouTube and use Anki, start with Language Reactor. For many platforms and AI explanations, try Trancy. For exercises and auto-pause, choose Sabi, and for a free test run, Funlingo. Whichever you pick, run the study routine above and let two captions do the work for a few weeks before you judge it.
If you also want to practice speaking, you can try SidebySpeak free on your next call and see the speech and its translation side by side. No card is needed for the 20 free minutes.