Script Looper — Loop YouTube Videos & Learn Languages with AI

Tracking since Apr 4, 2026.

Changelog

• May 29, 2026
  description

  Script Looper helps you build listening and speaking through real YouTube with subtitles, with AI-assisted meaning, looping, speed control, fine sync tweaks, and TTS—so practice stays in flow.
  
  [Quick start]
  
  1. Install
  On Google, search for "Script Looper" → add from the Chrome Web Store (free, no sign-in).
  
  2. Open a captioned YouTube video
  Pick a video from the Curated captioned-YouTube picks blog (drenglish.tistory.com), or any video with subtitles.
  
  3. One-click AI script panel
  In the subtitles area, click the robot icon(🤖) to generate a side panel script with line-by-line contextual explanations (via ChatGPT).
  
  [Core workflow (shortcuts)]
  
  ● Subtitle click → Z: toggle infinite loop for that subtitle segment.
  ● A / D: move to previous / next subtitle while looping.
  ● < / >: adjust playback speed (e.g. 0.75×, 0.5×).
  ● 1–4 and Q–R: nudge the audio window to match the subtitle timing (±0.1s / ±0.5s) while you listen.
  
  [Ask AI in context]
  
  ● Press Space to pause → select text → click ["Ask ChatGPT] or ["] pop-up.
  Good for words, idioms, phrasal verbs, slang, grammar, with examples grounded in the surrounding context.
  ● Press Space again to jump back into the script view and continue looping.
  
  [TTS for clarity and pronunciation]
  
  ● Click an English subtitle line (or an example sentence in the AI answer) → press C: toggle infinite TTS repeat using three native-like voices.
  ● A / D: previous / next line while repeating.
  
  [Multi-caption looping]
  
  ● Drag-select multiple subtitles → X: toggle cycle loop across the selected lines.
  
  [Why Script Looper]
  
  ● Removes friction: looping, speed, sync, and AI explanations are reachable without breaking your study rhythm.
  ● Built around real input: learn from authentic speech on YouTube—not textbook-only audio.
  ● Re-segmented subtitles: lines are split into more readable chunks (phrases / sense units) to improve immersion.
  
  [What makes it different]
  
  1. One-click contextual script panel next to the video.
  2. Keyboard-first looping + navigation (Z, A/D, </>).
  3. Precise sync adjustment for mismatched captions vs audio.
  4. Context Q&A with ChatGPT from a paused selection.
  5. TTS loop practice (C, A/D).
  6. Works for many languages 🌍: if a YouTube video has subtitles, you can use it for lots of target languages.
  7. UI language support (21 languages): e.g. if your browser language is Vietnamese, explanations can be generated in Vietnamese.
  
  [Optional resources]
  
   📝 Curated captioned-YouTube picks (blog): https://drenglish.tistory.com/
   🎥 Developer YouTube channel: https://www.youtube.com/@ScriptLooper-English
  
  [A note on “comprehensible input”]
  
  Listening and speaking improve fastest when you accumulate lots of understandable spoken input (comprehensible input) from real content. Script Looper is designed to help you stay immersed, repeat effortlessly, and resolve unknowns quickly so input volume goes up without the tool getting in the way.
  
  [Free extension]
  Script Looper is free and does not require login. Install it, open a captioned YouTube video, and start looping with meaning.

  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.

• May 29, 2026
  short_description

  Designed to support listening & speaking acquisition on YouTube: caption loops, in-context AI help, sync/speed, TTS. Free, no login.

  Loop any YouTube subtitle instantly, get AI context explanations, and fine-tune sync. Works on PC, Android & iPhone.

• May 29, 2026
  name

  Script Looper — YouTube Listening & Speaking Practice

  Script Looper — Loop YouTube Videos & Learn Languages with AI

• May 29, 2026
  host_permissions

  https://www.youtube.com/*, https://chat.openai.com/*, https://chatgpt.com/*, https://translate.googleapis.com/*, http://localhost:8787/*

  https://www.youtube.com/*, https://chat.openai.com/*, https://chatgpt.com/*, https://gemini.google.com/*, https://translate.googleapis.com/*, http://localhost:8787/*

• May 29, 2026
  permissions

  storage, clipboardWrite, scripting, activeTab, tabs, system.display

  storage, clipboardWrite, scripting, activeTab, tabs, system.display, bookmarks

• May 11, 2026
  host_permissions

  https://www.youtube.com/*, https://chat.openai.com/*, https://chatgpt.com/*, https://translate.googleapis.com/*

  https://www.youtube.com/*, https://chat.openai.com/*, https://chatgpt.com/*, https://translate.googleapis.com/*, http://localhost:8787/*

• May 5, 2026
  description

  How to Use Script Looper
  
  1. Create a script by translating all subtitles
  Click the Translate All with ChatGPT 🤖 / Translate All with Gemini ✨ buttons at the top of the subtitle panel to open ChatGPT/Gemini on the right and automatically generate a script where each subtitle line is paired with its translation.
  For long videos, select about 5 minutes of subtitles, right‑click, and use Translate with ChatGPT / Translate with Gemini to translate in chunks.
  * ChatGPT/Gemini login required (both free and paid accounts are supported)
  
  2. Sentence‑level loop playback (Z, A/D, Space)
  Click a subtitle line and press Z to highlight that sentence and loop it on YouTube.
  While looping, D/A loops the next/previous subtitle, Space toggles play/pause, and pressing Z again stops the loop.
  
  3. Explain unknown parts + loop example sentences with TTS (C)
  When you need extra explanation, press Space to pause, then drag to select text. A quote button " or a popup such as “Ask ChatGPT” / “Ask Gemini” appears.
  Click it to generate explanations and three example sentences. Drag an example and press C to loop it with TTS. Use D/A to move to the next/previous example, and press C again to stop. Clicking the original selected text at the top of the answer jumps back to the corresponding subtitle on YouTube.
  
  4. Loop a range of multiple subtitles (X)
  Drag to select several subtitle lines in the panel and press X to loop the entire selected range.
  Press X again to stop looping that section.
  
  5. Subtitle/audio sync adjustment (1–4, Q/W/E/R)
  If subtitles and audio are out of sync while looping with Z/X/A/D, use 1/2 (start −0.1s/+0.1s), 3/4 (end −0.1s/+0.1s), Q/W (start −0.5s/+0.5s), and E/R (end −0.5s/+0.5s) to fine‑tune the loop start and end times.
  
  6. Playback speed control (<, >)
  Press < to slow down playback and > to speed it up (e.g., 0.75x, 0.5x, 1.0x, 1.25x).
  
  🛠 Script Panel Buttons
  ❓ Help: Open this help panel
  🤖 ChatGPT: Send all subtitles of the current video to ChatGPT and generate a script
  ✨ Gemini: Send all subtitles of the current video to Gemini and generate a script
  📝 Blog: Open the ScriptLooper blog with recommended subtitle‑based YouTube videos
  🎥 YouTube: Open the developer’s YouTube channel
  ❌ X: Close the script panel
  SL SL: Open the script panel

  Script Looper helps you build listening and speaking through real YouTube with subtitles, with AI-assisted meaning, looping, speed control, fine sync tweaks, and TTS—so practice stays in flow.
  
  [Quick start]
  
  1. Install
  On Google, search for "Script Looper" → add from the Chrome Web Store (free, no sign-in).
  
  2. Open a captioned YouTube video
  Pick a video from the Curated captioned-YouTube picks blog (drenglish.tistory.com), or any video with subtitles.
  
  3. One-click AI script panel
  In the subtitles area, click the robot icon(🤖) to generate a side panel script with line-by-line contextual explanations (via ChatGPT).
  
  [Core workflow (shortcuts)]
  
  ● Subtitle click → Z: toggle infinite loop for that subtitle segment.
  ● A / D: move to previous / next subtitle while looping.
  ● < / >: adjust playback speed (e.g. 0.75×, 0.5×).
  ● 1–4 and Q–R: nudge the audio window to match the subtitle timing (±0.1s / ±0.5s) while you listen.
  
  [Ask AI in context]
  
  ● Press Space to pause → select text → click ["Ask ChatGPT] or ["] pop-up.
  Good for words, idioms, phrasal verbs, slang, grammar, with examples grounded in the surrounding context.
  ● Press Space again to jump back into the script view and continue looping.
  
  [TTS for clarity and pronunciation]
  
  ● Click an English subtitle line (or an example sentence in the AI answer) → press C: toggle infinite TTS repeat using three native-like voices.
  ● A / D: previous / next line while repeating.
  
  [Multi-caption looping]
  
  ● Drag-select multiple subtitles → X: toggle cycle loop across the selected lines.
  
  [Why Script Looper]
  
  ● Removes friction: looping, speed, sync, and AI explanations are reachable without breaking your study rhythm.
  ● Built around real input: learn from authentic speech on YouTube—not textbook-only audio.
  ● Re-segmented subtitles: lines are split into more readable chunks (phrases / sense units) to improve immersion.
  
  [What makes it different]
  
  1. One-click contextual script panel next to the video.
  2. Keyboard-first looping + navigation (Z, A/D, </>).
  3. Precise sync adjustment for mismatched captions vs audio.
  4. Context Q&A with ChatGPT from a paused selection.
  5. TTS loop practice (C, A/D).
  6. Works for many languages 🌍: if a YouTube video has subtitles, you can use it for lots of target languages.
  7. UI language support (21 languages): e.g. if your browser language is Vietnamese, explanations can be generated in Vietnamese.
  
  [Optional resources]
  
   📝 Curated captioned-YouTube picks (blog): https://drenglish.tistory.com/
   🎥 Developer YouTube channel: https://www.youtube.com/@ScriptLooper-English
  
  [A note on “comprehensible input”]
  
  Listening and speaking improve fastest when you accumulate lots of understandable spoken input (comprehensible input) from real content. Script Looper is designed to help you stay immersed, repeat effortlessly, and resolve unknowns quickly so input volume goes up without the tool getting in the way.
  
  [Free extension]
  Script Looper is free and does not require login. Install it, open a captioned YouTube video, and start looping with meaning.

• May 5, 2026
  short_description

  🎧 Script Looper - Auto loop YouTube subtitles & AI generates explanations. Perfect for listening, speaking, and shadowing!

  Designed to support listening & speaking acquisition on YouTube: caption loops, in-context AI help, sync/speed, TTS. Free, no login.

• May 5, 2026
  name

  Script Looper - Auto Loop YouTube & AI Explanations

  Script Looper — YouTube Listening & Speaking Practice

• May 5, 2026
  host_permissions

  https://www.youtube.com/*, https://chat.openai.com/*, https://chatgpt.com/*, https://gemini.google.com/*, https://translate.googleapis.com/*

  https://www.youtube.com/*, https://chat.openai.com/*, https://chatgpt.com/*, https://translate.googleapis.com/*

Permissions & access

Permissions

storageclipboardWritescriptingactiveTabtabssystem.displaybookmarks

Host access

https://www.youtube.com/*, https://chat.openai.com/*, https://chatgpt.com/*, https://gemini.google.com/*, https://translate.googleapis.com/*, http://localhost:8787/*

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