LingTube

LingTube is a YouTube video speech translation, subtitle translation, and AI dubbing extension. Open a video and start it with one click: LingTube translates foreign-language captions or recognizes speech in videos without captions, then reads/dubs the translation in a natural voice, so you can quickly understand foreign-language YouTube videos without constantly watching subtitles. Enjoy instant AI dubbing and subtitle translation across YouTube, Coursera, Udemy, Bilibili.tv, and TikTok—simply play any video to get started immediately. Ideal for language learning, courses, technical tutorials, news, podcasts, anime, movie clips, and watching during a commute. Key features - YouTube video translation: translate subtitles, speech, and no-caption video content - Bilingual subtitles: translation + original on screen, or translation-only/original-only - AI dubbing / subtitle read-aloud: read translations with Edge TTS or browser voices - No-caption handling: when a video has no captions, automatically convert speech to text, then translate and read it aloud - Context-aware translation: supports Google Translate and OpenAI-compatible APIs to improve understanding of long sentences and specialized content - AI learning: generate vocabulary, grammar, exercises, scoring, and review content - Audio mixing: original video audio and translated voice can play together with separate volume controls - One-click start/stop, with Alt+Shift+V hotkey support - AI video summary / summarizer: after AI is ready, it can use the full translated subtitles and video dialogue to quickly summarize YouTube videos, extract key points, explain technical terms, and find relevant timestamps. Ideal for quickly understanding long videos, course videos, technical tutorials, news, and podcasts. Privacy - Runs only on YouTube, Coursera, Udemy, Bilibili.tv, and TikTok pages - Settings are saved in the local browser - Subtitle, translation, and voice requests are sent only to the services you enable extension, plugin