Captur

Turn your favorite YouTube videos, articles, and blogs into systematic vocabulary learning. Click to save as flashcard.

Build vocabulary from content you love. Captur helps ESL students and professionals build vocabulary naturally—turn your favorite YouTube videos, articles, and blogs into systematic vocabulary learning with AI-powered assistance. **How It Works:** 1. **Hover-to-Translate - Instant Vocabulary Lookup** - Select any word or phrase on any webpage - Small teal dot appears at the end of selection - Hover over dot → instant inline translation appears - Example: "opportunities" becomes **opportunities** _(机会)_ - Creates clickable vocabulary button you can save - Supports 18 languages: Chinese (Simplified/Traditional), Spanish, French, German, Japanese, Korean, Portuguese, Italian, Russian, Arabic, Hindi, Dutch, Polish, Turkish, Vietnamese, Thai, Indonesian - 30x faster than traditional dictionary lookup 2. **One-Click Flashcard Save** - Click vocabulary button (yellow highlighted word + translation) - Button turns green with border highlight → saved - Flashcard includes: word, translation, definition, example sentence, and source URL - All flashcards sync to https://captur.academy - Review at https://captur.academy with your saved vocabulary collection 3. **AI Writing Assistant (Double-Shift)** - Select text and press Shift key twice quickly - Advanced tooltip appears with 5 AI actions: - **Rephrase**: Generate alternative phrasings - **Translate**: Translate to your selected language - **Synonym**: Find synonym options - **Simplify**: Simplify complex text - **Reply**: Generate smart reply suggestions - Click any option to replace original text - Works in Google Docs, email composers, text editors, and all editable fields 4. **YouTube Transcript with Synchronized Playback** - Click "📝" button on any YouTube video - Side-by-side view: video + synchronized scrolling transcript - Transcript highlights current segment as video plays - Click any segment to jump to that timestamp in video - Auto-scroll keeps pace with video playback - Manual scroll mode with "Jump to Current" button - Copy entire transcript with one click - Page layout adjusts to 50/50 split for optimal viewing 5. **AI-Powered Key Takeaways & Vocabulary Extraction** - Click "📝 Key Takeaways" floating button on any webpage - AI analyzes page content and generates key points - Automatically detects page type (X/Twitter post, YouTube video, news article, product page, or general article) - Extracts difficult vocabulary with inline translations - Displays in organized sticky note with 3 tabs: - **Takeaways**: AI summary with vocabulary translations - **Marked**: Categorized sentences (vocabulary, claims, hooks, expressions) - **Reflect**: Your personal notes and reflections - All content auto-saves and persists per webpage URL **Perfect For:** - ESL students preparing for exams (TOEFL, IELTS, GRE) who consume English content daily - International professionals who want to expand vocabulary while reading industry content - Language learners building fluency through content they enjoy (YouTube, articles, blogs) - Anyone who wants to learn English naturally through favorite creators and topics