About This Site
YouTube & Netflix dual subtitles with context-aware AI translation for language learning. LingTube is an AI language learning Chrome extension that adds dual subtitles (bilingual subtitles) to YouTube and Netflix. Instead of translating words like a dictionary, it translates each word and phrase using the subtitle line it appears in and its part of speech, so learners get the meaning used in that sentence. Subtitles are automatically tagged by part of speech, with furigana for Japanese and pinyin for Chinese. Learners can get a grammar breakdown of any sentence, and saved words are tagged with an estimated CEFR level. For YouTube videos without captions, LingTube transcribes the audio with AI and translates it. It also generates video summaries, outlines and mind maps, and answers questions about the video with clickable timestamps. To practice, learners can shadow each subtitle line with waveform comparison, listen to an AI voice-over of the translation, and review saved words and sentences or export them to Anki. LingTube is also social: learners can write timestamped notes and share them on the video's progress bar, and chat through danmaku (scrolling comments) on both YouTube and Netflix. YouTube chapters, thumbnail previews, the most-replayed heatmap and Shorts keep working in study mode. LingTube supports 8 learning languages and more than 10 native languages.
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Key Features AI
Core Features
Dual subtitles for YouTube and Netflix: Show the original and translated subtitles together.
Context-aware AI word and phrase translation: Translations are chosen from the subtitle line and the word's part of speech, which helps with words that have several meanings. Tap the AI button for a detailed explanation.
Part-of-speech tagging with furigana and pinyin: Subtitles are analyzed with language-specific NLP. Japanese gets furigana and Chinese gets tone-marked pinyin.
AI grammar analysis and CEFR levels: Get a grammar breakdown of any sentence. Saved words are tagged with an estimated CEFR level (A1–C2).
AI transcription for YouTube videos without captions: Generate subtitles from the audio with Whisper, then translate them into your native language.
AI Q&A based on the video: Ask questions about what's being said and get answers with clickable timestamps.
AI YouTube summary, outline and mind map: See the structure of a long video before or after watching it.
Shadowing practice: Record yourself repeating each subtitle line and compare your waveform with the original audio. Free for all users.
AI voice-over: Hear the translated subtitles read aloud in sync with the video.
Vocabulary and sentence review: Review saved words and sentences with links back to the original video moment, and export them to Anki.
Shareable timestamped notes: Write Markdown notes at a moment in the video. Public notes appear on the progress bar for other learners watching the same video.
Danmaku on YouTube and Netflix: Send and read scrolling comments tied to the video timeline.
Works with YouTube chapters, thumbnail previews, the most-replayed heatmap, and Shorts in a portrait study layout.
Advantages
Combines language-learning and video analysis tools in one Chrome extension.
Supports YouTube and Netflix.
Provides contextual translation, grammar explanations, and vocabulary difficulty levels.
Offers summaries, outlines, and Q&A to help users review video content.
Free plan is available, and registration includes three days of Premium access.
Supports multiple study and interface languages.
缺点：Requires a Chrome extension and is intended for YouTube and Netflix.
缺点：Free-plan access to AI features is limited compared with paid plans.
缺点：Some video analysis features require users to log in.
缺点：Subtitle requests may be temporarily blocked by YouTube's rate limits, particularly on shared VPN or proxy networks.
缺点：The listed plans and features do not specify every operational limit or availability condition.
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