Freemium
Added on Oct 25,2026
LingTube is an AI-powered video learning assistant that runs as a Chrome extension on YouTube and Netflix, helping people learn languages and capture knowledge while they watch.
It adds bilingual subtitles to videos, and its tap-to-translate feature shows colour-coded parts of speech with instant word lookup, so learners can study vocabulary in context without leaving the video.
Key features include AI subtitle transcription for videos without captions, real-time AI interpreting of speech, one-click video summaries and structured outlines, AI Q&A about the video content, and timestamp notes that let you pin a key point and jump back to it later.
Translation is handled by large language models, with context-aware analysis that explains grammar and picks the right meaning of a word based on the sentence. A built-in NLP engine handles tokenisation, lemmatisation and part-of-speech tagging, and an AI CEFR detector assigns levels from A1 upwards to words and collocations so you can filter vocabulary by difficulty.
Study languages include English, French, Spanish, German, Japanese, Korean, Italian and Simplified Chinese, while the interface and translations are available in 11 native languages including Traditional Chinese, Brazilian Portuguese, Vietnamese and Indonesian.
Other learning tools include shadow reading for speaking practice, AI subtitle merging that joins fragmented captions, a listening mask, kanji furigana annotation, danmaku comments, YouTube Shorts support and export to Anki on the top plan.
Pricing: a Free plan covers bilingual subtitles, shadow reading and danmaku, with 3 days of Premium on registration. Plus costs USD 5.99 per month and adds AI translation, grammar analysis, summaries, Q&A, transcription (5 hours per month) and ad-free use. Premium costs USD 9.99 per month with about double the AI quotas, timestamp jumps from summaries and Anki export. Yearly billing saves 20 percent.
It is suited to language learners, students and anyone who uses YouTube or Netflix videos to study a new language or take notes on lectures.
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