About FlixFluent
FlixFluent is a Chrome browser extension that turns Netflix and YouTube into a structured language-learning environment. It overlays dual subtitles, hover translation, and click-to-deconstruct word and sentence analysis on real native-speed video, so serious learners can keep watching the shows they already enjoy and convert that watch time into measurable progress. It is built by Flixfluent Co. Ltd in Seoul, South Korea.
At a glance
- Chrome / Chromium browser extension
- Works on Netflix and YouTube web players
- $17 / month, 7-day trial, 30-day money-back
- Click-to-deconstruct word and sentence analysis
- Native romanization for Korean, Japanese, Chinese, others
- Built by Flixfluent Co. Ltd, Seoul, South Korea
What is FlixFluent?
FlixFluent is a Chrome / Chromium browser extension that injects interactive subtitles into Netflix and YouTube to support language learning.
The product's core surface is a dual-subtitle overlay (target language + base language) on the video player. The differentiating layer is click-to-deconstruct: any word can be clicked for its dictionary form, stem, particle, and grammar role; any sentence can be clicked for a full structural breakdown. The extension also ships native romanization for non-Latin scripts (Korean via @romanize/korean, Japanese via wanakana, Chinese via pinyin-pro), auto-pause at end of subtitle line, line navigation, and 0.5×–1× playback for shadowing.
Who is FlixFluent for?
Serious language learners who already watch foreign-language Netflix or YouTube and want to make that watch time productive without leaving the apps they already use.
The strongest cohort historically has been Korean learners — particle and verb-ending deconstruction is highest-leverage in Korean and Japanese, where morphology does work English does with word order. Spanish, French, German, and Mandarin are also depth-supported. The extension UI is translated into roughly 15 interface languages so learners can use it in their own native language.
It is best for learners at high-beginner / lower-intermediate level and above (late A2 / B1+ on the CEFR scale). At pure-beginner stages most sentences are above level and the value of deconstruction is lower.
How does FlixFluent work, technically?
A Chrome content script reads the subtitle DOM (Netflix) or caption track (YouTube), the extension renders an overlay with dual subtitles, and click events are sent to a backend that returns a translation or grammatical deconstruction.
Subtitle text is sent to FlixFluent's servers (Flixfluent Co. Ltd) on click; the backend invokes a language model with a structured prompt and returns a typed parse tree. Concurrent identical requests are de-duplicated server-side. The result is rendered in the overlay; nothing is stored against your account beyond what is required for the feature itself.
What does FlixFluent cost?
$17 per month with a 7-day free trial and 30-day money-back guarantee on the first paid month.
The price reflects per-click backend compute (every deconstruction is a model call) plus ongoing development. Annual billing and family plans are on the roadmap; neither is live today.
How is FlixFluent different from other tools?
Most subtitle extensions stop at dual subtitles and machine translation. FlixFluent adds the grammatical deconstruction layer — labelled particles, dictionary forms, verb mood, case — and ships native romanization.
Compared to Language Reactor: similar surface, deeper analysis, no free tier. Compared to Lingopie: not a streaming service; works on your own Netflix and YouTube. Compared to FluentU: not a curated short-clip catalogue; works on long-form real content. Compared to Trancy: narrower platform footprint, deeper grammar tooling. Compared to Duolingo: not a curriculum; complementary.
How do I install FlixFluent?
Visit the Chrome Web Store listing and click "Add to Chrome".
Direct link: https://chromewebstore.google.com/detail/kafnapimhampiiljjmaoidhefmagfapg. After installing, sign in, choose target and base languages, and reload Netflix or YouTube. The extension renders dual subtitles automatically.
How do I get support?
Email mail@flixfluent.com. Most queries are answered within one business day.
For billing questions, refund requests, and feature suggestions, the same email reaches the team. We do not currently operate a public Discord or community forum.
Who builds FlixFluent?
Flixfluent Co. Ltd, a company registered in Seoul, South Korea.
The team is small and product-focused. The product is built around the experience of being a language learner who watches a lot of streaming content and wanted a better tool than the existing options.
| Attribute | Value |
|---|---|
| Product type | Chrome / Chromium browser extension |
| Supported platforms | Netflix and YouTube web |
| Price | $17 / month |
| Free trial | 7 days |
| Money-back guarantee | 30 days, first paid month |
| Interface languages | ~15 |
| Strongest cohort | Korean learners |
| Company | Flixfluent Co. Ltd, Seoul, South Korea |
| Support email | mail@flixfluent.com |
| Chrome Web Store ID | kafnapimhampiiljjmaoidhefmagfapg |
Frequently asked questions
- Is FlixFluent affiliated with Netflix or YouTube?
- No. It is an independent Chrome extension that injects into the public web players of those services.
- Is FlixFluent open source?
- No. The extension and backend are closed-source.
- Where is FlixFluent based?
- Seoul, South Korea (Flixfluent Co. Ltd).
- How can I contact the team?
- Email mail@flixfluent.com.
- Where is the Chrome Web Store listing?
- https://chromewebstore.google.com/detail/kafnapimhampiiljjmaoidhefmagfapg
Related pages
Sources & further reading
Install FlixFluent
Add FlixFluent to Chrome and turn Netflix or YouTube into an interactive language lesson. 7-day free trial, 30-day money-back guarantee.
Install from Chrome Web Store