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 [Quick Start Guide] 1) Install Script Looper Search "Script Looper" on Google → Add from Chrome Web Store → Select a subtitled YouTube video from our curated blog (https://drenglish.tistory.com/) or search YouTube directly filtering by subtitles 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. ========================================================= [Why Script Looper?] 🤖 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. ========================================================= [Key Features — What No Other Tool Offers] 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 < and >. 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. ========================================================= [Script Panel Buttons] ❓ Help | 💡 FAQ | 💬 Forum | 5' 5-min segmen |🤖 ChatGPT Translation | ✨ Gemini Translation | 📋 / ↩ Paste / return to original | 📝 Blog | 🎥 Developer YouTube Channel | ❌ Close Panel ========================================================= [Never Wonder What to Study — Content Ecosystem] 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.