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Master English shadowing on YouTube. Repeat lines, record your voice, and get instant AI feedback to speak with confidence. Master natural pronunciation, rhythm, and fluency — the way native speakers actually talk. Whether you're preparing for IELTS, TOEIC, improving daily conversation, or simply wanting to sound more confident, EchoFlow makes shadowing effective, enjoyable, and completely private. Why EchoFlow Works So Well - Smart Line-by-Line Shadowing: Automatically detects sentence boundaries, pauses for you to repeat, and supports custom repeat loops and playback speed. - Voice Recording & Instant Comparison: Record yourself and play side-by-side with the original audio to clearly hear your progress. - On-Device AI Pronunciation Feedback: Powered by a Whisper-class model (Transformers.js + ONNX). Receive word-level scores on pronunciation, rhythm, and fluency — all processed locally in your browser. - Helpful Learning Tools: Tap any word for Chrome text-to-speech pronunciation, optional free word translation, adjustable subtitle size, and context lines. - Flexible & Clean Interface: Drag the practice panel anywhere, adjust opacity, choose different Whisper model tiers, and more. - Fully Local Storage: Your practice history is saved only in your browser. No account or login required. Pricing & Future Plans EchoFlow is completely free to use right now — no limitations, no hidden fees. Start improving your English speaking today! We plan to introduce optional paid advanced features in the future (such as more powerful models, extra analytics, or additional customization options) to support ongoing development. The core shadowing experience — including line-by-line practice, voice recording, and on-device AI feedback — will always remain free. Privacy First All speech recognition runs 100% on your device. Model files are downloaded directly from Hugging Face only when needed. Your voice recordings are never uploaded to our servers. Start your daily shadowing practice today and finally break through your speaking barrier — one YouTube video at a time!
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.
AI Video Dub - Realtime Translation & Voice
AI-powered YouTube video translation & voice dubbing with natural AI voices. Supports 70+ languages. AI Video Dub is a powerful Chrome extension that translates YouTube videos in real-time with natural AI voice dubbing in 70+ languages. AI Video Dub is designed for users who want to watch YouTube content in their native language without language barriers. The extension uses advanced AI technology to: 1. Translate video content to your selected target language using Microsoft Translator 2. Display translated text as an overlay on the video 3. Generate natural-sounding voice dubbing using Microsoft Neural TTS voices 4. Synchronize the dubbed audio with video playback Real-Time Video Translation: The extension works seamlessly with YouTube. When you click "Start Translation" in the popup interface, the extension processes the video in real-time. The translated audio plays simultaneously with the video, allowing you to understand the content in your preferred language. AI Voice Dubbing (NEW): Powered by Microsoft Neural TTS — over 400 natural-sounding voices across 70+ languages. Each language has multiple voice options (male/female). Audio is pre-generated before playback starts for seamless, synchronized dubbing with no delays. Video to Text: Get the full transcript of any YouTube video with timecodes. Click any line to jump to that exact moment — perfect for finding key points, quotes, or re-watching specific scenes. Translate the entire transcript into any of 50+ supported languages. Copy with one click or download as SRT subtitle file for use in video players or editors. Subtitle History: A draggable, resizable panel displays every subtitle that was voiced during your session, so you can scroll back through the entire conversation. Copy the whole history with one click for note-taking, language learning, or documentation. SRT Subtitle Download (NEW): Download translated subtitles as standard .srt files. Compatible with all major video players (VLC, MPV) and video editors (Premiere, DaVinci). Perfect for content creators who want to add subtitles to their own videos. Customizable Playback: - Adjust voice volume and original audio volume independently - Change speech rate from 0.5x to 1.5x - Select from multiple AI voices per language - Show or hide translated and original subtitles - Drag subtitle overlay to your preferred position - Drag and resize the Video to Text and Subtitle History panels - Searchable language selector for quick language switching Multi-Language Support: The extension supports translation and voice dubbing in 50+ languages including: English, Spanish, Portuguese, Russian, French, German, Chinese, Japanese, Korean, Hindi, Arabic, Turkish, Italian, Polish, Dutch, Indonesian, Vietnamese, Thai, Ukrainian, Czech, Armenian, Romanian, Swedish, Greek, Hebrew, Bengali, Urdu, Persian, Malay, Filipino, Hungarian, Finnish, Danish, Norwegian, Bulgarian, Slovak, Croatian, Serbian, Catalan, Tamil, Telugu, Marathi, Gujarati, Kannada, Malayalam, Nepali, Azerbaijani, Georgian, Swahili, Afrikaans, Kazakh, and Uzbek, Punjabi, Pashto, Yoruba, Burmese, Lao, Amharic, Sinhala, Khmer, Zulu, Albanian, Belarusian, Mongolian, Lithuanian, Bosnian, Slovenian, Galician, Macedonian, Irish, Latvian, Estonian, Icelandic, and Welsh. User Feedback & Reviews: Send feedback, report bugs, or suggest new features directly from the extension popup using the "Report a problem" button. Every piece of feedback is reviewed by our team. 1. Visit any YouTube video 2. Click the AI Video Dub extension icon 3. Sign in with your Google account 4. Search and select your target language 5. Click "Start Translation" — wait a few seconds while AI voices are generated 6. Watch the video in your language with natural voice dubbing 7. Optionally open Video to Text for the full transcript or download SRT subtitles AI Video Dub uses Google OAuth 2.0 for secure user authentication. No passwords are stored. Users can revoke access at any time through Google Account Settings. Works with all Chromium-based browsers (Chrome, Edge, Brave, Opera) - even if Chrome sign-in is disabled. This extension: - Does not collect personal information beyond Google authentication - Does not store user viewing history - Does not track user activity - Does not share data with third parties - Uses Google OAuth 2.0 for secure authentication only - Translation requests are processed securely and not stored long-term - User feedback is voluntary and only submitted when the user explicitly clicks "Send feedback" Support and Feedback: For technical support, bug reports, or feature requests, please visit aivideodub.com, use the "Report a problem" button directly in the extension, or contact our support team.
YouTube To Transcript: AI Summarizer & Chat
Get instant YouTube transcripts with AI summaries, insights, and chat features. Ideal for faster learning and note-taking. YouTube to Transcript instantly turns any YouTube video into text you can use. Get accurate transcripts, AI-generated summaries, key insights, timestamps, and even chat with the video’s content. Perfect for learners, researchers, and creators who want to save time and understand videos faster. ⚡ Instant transcripts for any YouTube video 🧠 AI summaries, key points & takeaways 💬 Chat with the video to ask questions or clarify content ⭐ Works directly on YouTube or via popup 📘 Great for studying, note-taking, and research
Script Looper — Loop YouTube Videos & Learn Languages with AI
Loop any YouTube subtitle instantly, get AI context explanations, and fine-tune sync. Works on PC, Android & iPhone. Script Looper — Your Ultimate YouTube Language Learning Assistant 2) Generate AI-Translated Script Panel Click the 🤖 icon (ChatGPT) or ✨ icon (Gemini) at the top of the subtitle panel → A script panel with contextual translations appears on the right. - For long videos, click the 5' button, choose a numbered ~5-minute segment, then use the translation popup shown as 번역(Translate popup) to translate in chunks for better stability. Click the "Copy Response" (⧉) button at the bottom of the translated script → Click the 📋 (Paste Translation) button on the YouTube subtitle panel to display translations alongside each subtitle. * ChatGPT or Gemini login required (free or paid accounts both supported) 3) One-Touch Repeat, Speed Control & Sync Adjustment - Click a subtitle in the script panel → Z key: Loop the current subtitle section infinitely On/Off - A/D keys: Move to previous/next subtitle and loop - Space: Play/Pause - : Adjust playback speed (e.g. 0.75x, 0.5x) - 1~4 / Q~R: Fine-tune audio start/end points to match subtitles (±0.1s / ±0.5s) 4) One-Click AI Contextual Explanation - Pause with Space → Drag to select any word or phrase → Click the "Ask" popup: Instant contextual explanation with 3 example sentences for words, idioms, phrasal verbs, slang, grammar, and more - Press Space again to auto-scroll back and resume looping 5) Pronunciation Training with TTS (Text to Speech) - Click any subtitle or example sentence → C key: Loop audio from 3 native speaker voices On/Off - A/D keys: Move to previous/next item and loop 6) Multi-Subtitle Loop Drag to select a portion or multiple subtitles → X key: The entire selected range is highlighted and loops automatically. Press X again to stop. [Works on Computers and Mobile Devices] ◆ Computer (Chrome) Search "Script Looper" → Add from Chrome Web Store → Open any subtitled YouTube video and start immediately ◆ Android (Lemur Browser) Download 'Lemur Browser-Extensions' from Play Store → Tap the "four squares" button at bottom right → Extensions → Chrome Web Store → Search and install Script Looper → Tap the "three lines" button → Check Desktop mode → Open a subtitled YouTube video ◆ iPhone / iPad (Orion Browser) Download 'Orion Browser by Kagi' from App Store → Tap the "circle with three dots" button at bottom right → Extensions → + button → Install Chrome extension → Search and install Script Looper → Settings → Websites → Request Desktop Website → Turn on YouTube & Other Websites → Open a subtitled YouTube video ※ Lemur Browser and Orion Browser are mobile browsers that support Chrome extensions. 🤖 Break through listening barriers: Flexible loop practice, speed control, AI contextual explanations 🔄 Uninterrupted input: One-touch looping, one-click full translation & Q&A 📱 Learn anywhere, anytime: Fully works on smartphones — the world's only mobile-supported language learning extension 🚀 Acquisition over study: Real native YouTube content, not textbook recordings or test materials Script Looper was built by a developer who created it for their own language learning — and refined it through thousands of hours of personal use. Existing tools lacked auto-looping, offered no sync adjustment, provided only poor literal translations, and interrupted study flow with clunky dictionary searches. Script Looper was developed to eliminate every one of these obstacles, making it the ultimate tool for accumulating comprehensible input efficiently and enjoyably. 1. One-Click AI Contextual Translation & Script Panel Click 🤖 (ChatGPT) or ✨ (Gemini) to instantly generate a script panel on the right side of YouTube, with contextual translations displayed alongside each subtitle. YouTube subtitles are re-segmented into sentence and meaning units for better visual focus. 2. One-Touch Infinite Loop & Speed Control [Z, A/D, Space, ] Click any subtitle and press Z to loop that section infinitely. A/D moves to the previous/next subtitle while keeping the loop active. The active subtitle is highlighted and auto-scrolled to the top 30% of the panel so your eyes stay focused. Adjust speed anytime with . 3. Sync Adjustment — World Exclusive [1~4, Q~R] When audio and subtitle timing are off, practice efficiency drops sharply. Fine-tune the start and end points of any loop in 0.1-second increments while listening in real time. No other tool in the world offers this feature. 4. One-Click AI Contextual Q&A Pause with Space, drag any word or phrase, and click the "Ask" popup. AI instantly generates a detailed contextual explanation with 3 example sentences covering vocabulary, idioms, phrasal verbs, slang, and grammar. Press Space again to auto-scroll back and resume looping. 5. Pronunciation Training with TTS [C, A/D] Click any subtitle or example sentence and press C to hear it read aloud repeatedly by 3 different native speaker voices. The active line is highlighted and auto-scrolled for easy tracking. Move between items freely with A/D. 6. Multi-Subtitle Loop [X] Drag to select any portion or range of subtitles and press X. The entire selected range loops automatically with full highlighting. Press X again to stop. 7. All Languages Supported 🌍 Not just English! Any subtitled YouTube video can be used to learn Japanese, Spanish, French, and most world languages. Script Looper supports 21 interface languages — for example, accessing with a Vietnamese browser will generate all translations and explanations in Vietnamese. 8. World's Only Mobile-Fully-Supported Extension 🌐📱 Every other language learning extension is limited to desktop. Script Looper runs perfectly on Android (Lemur Browser) and iPhone (Orion Browser) as well as PC (Chrome) — making it the world's only extension with full mobile support. Study at home, on your commute, anywhere — with your smartphone delivering the same high-quality training as your computer. Curated Subtitle YouTube Blog 📝: Sitcoms, animation, news, talk shows, lectures, and more — organized by category. Choose content that fits your goals, interests, and level. Visit the Forum to ask questions, share feedback, and exchange learning experiences. * Curated blog: https://drenglish.tistory.com/ Developer YouTube Channel 🎥: Watch the developer study live using Script Looper and experience real progress alongside them. * Developer channel: https://www.youtube.com/@ScriptLooper-English [Comprehensible Input — The Science Behind Script Looper] Comprehensible input — audio you can understand in context — is the key to breaking through listening barriers and unlocking natural speaking ability. Studying grammar and vocabulary alone cannot develop real listening and speaking skills. True language acquisition happens through continuous exposure to understandable native audio. Script Looper provides every feature you need to stay immersed, just as children naturally acquire their first language.
