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Transform Chinese videos into an interactive learning experience. Pinyin, translations, and colored subtitles on YouTube & Bilibili. SubsGen — Interactive Subtitles for Language Learners | YouTube & Bilibili Turn any YouTube or Bilibili video into an interactive language lesson. Hover words for instant translations, click to hear pronunciation, and follow along with color-coded vocabulary highlighting — directly inside subtitles, comments, and video descriptions. Built for any language with captions: Chinese, Russian, Spanish, English, Portuguese, French, German, Vietnamese, Thai, Korean, Indonesian, and more. The strongest experience is for Chinese learning, with full pinyin support, HSK color coding, traditional/simplified switching, and advanced word segmentation — but any subtitled video becomes study material. Hover over any word in subtitles, comments, or descriptions for instant translations in your selected language. Works seamlessly on both platforms. Dramas, podcasts, interviews, gaming videos, livestreams, lessons, documentaries, music videos, and vlogs all become interactive lessons. Vocabulary is automatically highlighted by frequency and difficulty level so you instantly recognize what’s beginner-friendly and what’s advanced. For Chinese: • HSK-based vocabulary levels For Russian and other supported languages: • Frequency-based difficulty tiers • Pinyin with tone marks above each character • HSK 1–6 color coding • One-click traditional ↔ simplified switching • Jieba-powered word tokenization Comments and video descriptions become interactive too. Learn slang, internet culture, casual speech, and real everyday language directly from native speakers. Customize your experience with: • Font size • Subtitle position • Background opacity • Word spacing • Line spacing • Translation visibility • Feature toggles • Per-language settings SubsGen lets you learn through videos you already enjoy watching — without interrupting your flow. Instead of memorizing isolated vocabulary lists, you naturally absorb words, pronunciation, and sentence structure through real content and real conversations. 1. Install SubsGen 2. Open YouTube or Bilibili 3. Translations — and for Chinese, pinyin — appear automatically 4. Hover words to learn meanings 5. Click words to hear pronunciation 🏆 PERFECT FOR • Language learners at any level (beginner → advanced) • Mandarin students and HSK candidates • Russian, Spanish, and Asian-language learners • Heritage speakers improving literacy • Anyone learning through native content instead of textbooks • 9 minutes/day FREE forever • Shared across YouTube and Bilibili • No credit card required ✅ Unlimited daily learning time ✅ All features and supported languages ✅ YouTube + Bilibili support ✅ Interactive comments & descriptions ✅ Priority support ✅ $4.99/month or $29.99/year Some features depend on subtitle availability for each video. Bilibili may require login for full subtitle access. Questions or feedback? Reach us through the extension settings or leave a review — community feedback directly shapes the roadmap.
YouTube Dubbing – Translate & Dub
YouTube Dubbing is a browser extension that translates and dubs online videos in real time. No need to read subtitles—just listen in your native language and understand foreign videos instantly, as naturally as watching local content. Open any video on YouTube, Bilibili, Udemy, or Coursera—YouTube Dubbing automatically translates the subtitles and plays AI dubbing with no extra steps. Just hit play to start. ★ Free — Dub up to 5 videos per day for free, perfect for everyday watching and language learners. ★ Premium — Unlimited videos, AI subtitle enhancement (GPT / Claude), preserve background audio, smart multi-speaker detection, and priority customer support. Core features: - One-click translation & dubbing — Press play to automatically translate subtitles and start dubbing, saving time and effort. - AI subtitle enhancement (Premium) — Even if a video has no subtitles (YouTube & Bilibili), AI can generate subtitles automatically and then translate and dub them. - Multi-model translation (Premium) — Supports leading LLMs like GPT and Claude for more natural and accurate translations. - Rich voice library — Male and female voices, multiple regional accents, automatically matched to the best voice for the target language. - Adaptive playback speed — Dubbing stays in sync at 0.5× to 2× speed. - Preserve background audio (Premium) — Keep original music and sound effects for a more immersive experience. - Smart multi-speaker detection (Premium) — Distinguish different speakers and assign different voices for richer, more natural dialogue. - Cross-platform support — Available on Chrome, Firefox, and Android. - Multi-site support — Works with major platforms like YouTube, Bilibili, Udemy, Coursera, and more. - Universal video dubbing — Even when a video is not covered by the extension’s built-in one-click support, YouTube Dubbing can intelligently detect the media source and guide you to download the video and upload it to our server for subtitle recognition. You will receive an email when processing is complete, then come back and watch. - Subtitle Summary — Subtitle Summary is not limited to YouTube; any website supported by the extension can summarize subtitle content. - Subtitle Editor — If the translation or dubbing still is not satisfactory, copy subtitles from Subtitle Editor to your preferred AI model for translation, then paste them back and save. After manually enabling “skip translation for same-language subtitles,” the extension can dub with your custom subtitles.
Medium Rare Subtitle - Dual Subtitles & AI Translation
Learn languages on YouTube and Bilibili with AI contextual translation, blurred subtitle training, and vocabulary collection for… Still struggling with whether to turn off the subtitles? There’s a better way! If Chinese-dubbed videos are "well-done," bilingual subtitles are "medium-well," and English-only subtitles are "medium," then "Medium-Rare Subtitles" offers you a brand new "medium-rare" experience—retaining enough challenge to keep your listening skills improving, while providing just the right support at critical moments. Smart Blur: Not just showing or hiding; it uses blur effects so you only see clearly when you need to! Personalized Learning: Mark words you can't hear clearly. The system automatically reveals them next time they appear. AI Contextual Translation: Get precise translations based on the specific sentence, including slang and professional jargon. Stay Immersed: No more frequent pausing to look up words. Focus on the video! Dual-Sub History: Provides a secondary track showing the previous line. Never miss a word again! Subtitle Masking: Mask hardcoded subtitles with a frosted glass effect. Bilingual Mode: Blur only the translation—see it clearly only when you need to! The Traditional Dilemma: Subtitles OFF → Constant pausing for new words breaks the experience. The Breakthrough: Blurred Display → Focus on listening, break the reading crutch. Active Progress → Unmark words as you master them to reduce dependence. 1.6.6: Massive Language Expansion! Added support for English (en), Simplified Chinese (zh-CN), Traditional Chinese (zh-TW), Japanese (ja), Korean (ko), Spanish (es), French (fr), German (de), Portuguese (pt), Russian (ru), Italian (it), Vietnamese (vi), Thai (th), and Arabic (ar). Supports cross-language targets (e.g., Japanese to English). 1.6.5: Redesigned UI style! Added subtitle export and word pronunciation. 1.6.0: Added Frosted Glass Masking; Dual-sub mode; Hover-to-Pause mode. Squeezed the toothpaste tube for this one!
LingTube - YouTube Subtitle Translator & Voice
Translate YouTube videos, speech and subtitles: bilingual captions, video transcription, AI dubbing and voice read-aloud. 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. Also supports the Coursera online education platform. 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 pages - Settings are saved in the local browser - Subtitle, translation, and voice requests are sent only to the services you enable extension, plugin
YouTube翻訳
Can't understand YouTube English videos? YouTube Dual Subtitles: Translate and Learn English with Firgrow uses AI to create native-level translations for you, saying goodbye to stiff machine translations! Precise sentence segmentation, natural and fluent, making complex content easy to understand. Ready to use immediately, core features free, helping you deeply explore the English world and immersively improve your English. The ultimate YouTube Dual Subtitles tool designed for English learners ❮Why Choose YouTube Dual Subtitles with Firgrow❯ ● Designed specifically for English learners - If you aspire to navigate the English world, YouTube Dual Subtitles will become your powerful assistant, making YouTube English video content within reach. ● Lightning-fast experience - After opening a YouTube video, AI dual subtitles appear instantly in just 5 seconds. Real-time synchronization regardless of video length, no waiting required. ● Ultra-simple operation - No registration, no payment, no complex settings required. YouTube Dual Subtitles experience starts automatically after installation. ● Natural and fluent - AI intelligently analyzes context, automatically segments sentences, corrects errors, and provides interpretive translation, generating naturally smooth dual subtitles that are comfortable to read, completely eliminating the stiffness of mechanical translation. Using the same high-quality translation engine as Firgrow, not only providing translation but also helping you effectively expand your English vocabulary. Note: This feature is disabled by default and can be enabled from settings after installation, or automatically enabled the next day. ❮Frequently Asked Questions❯ How is the quality of YouTube Dual Subtitles? After testing thousands of YouTube videos, Chinese subtitles generated by Firgrow AI are smooth and natural, comfortable to read, with high translation accuracy. How wide is YouTube Dual Subtitles support? Supports the vast majority of YouTube English videos, as long as the video has original automatic English subtitles. This is the prerequisite for ensuring lightning-fast experience and free usage. Even for videos with accents, YouTube Dual Subtitles accuracy is guaranteed. Is it helpful for English learning? YouTube Dual Subtitles is tailor-made for English learners! Quick and accurate AI dual subtitles make you enjoy watching YouTube English videos, discover more English content treasures, and cultivate a strong interest in English. Based on high-frequency exposure to English content, Firgrow will continue to provide more tools to comprehensively support your English improvement journey. ❮User Reviews❯ ● So powerful, the best YouTube Dual Subtitles translation tool, so accurate, I love it. ● This is the best YouTube dual subtitles plugin I've used so far, fast translation with high accuracy and reasonable layout. ● YouTube Dual Subtitles sentence segmentation is fantastic! ● Very thoughtful and excellent product, hope Firgrow can keep upgrading and optimizing. ● This is the best YouTube Dual Subtitles plugin I've ever used. ● Very useful, YouTube Dual Subtitles is very helpful for learning English! Install YouTube Dual Subtitles: Translate and Learn English with Firgrow now and start your new YouTube English video experience!
