DejaVocab - 得记单词

Learn English on YouTube with bilingual subtitles, one-click word & phrase lookup, and an AI sidebar for any webpage.

DejaVocab — turn what you watch and read into English you can use. Learn from YouTube, Bilibili and the webpages you already enjoy. Understand words in context, explore how sentences work, and build a personal library of expressions worth remembering. 🎬 Learn with YouTube and Bilibili ▸ Open an immersive learning view that keeps the video and subtitles together ▸ Use available saved or shared subtitles, with translations when you need them ▸ On YouTube, retrieve available original captions ▸ Request cloud transcription for supported YouTube and Bilibili videos, choose the spoken language, and follow the progress ▸ Click subtitle words for definitions, pronunciation and examples ▸ Explore phrases and sentence grammar without leaving the video ▸ Replay a subtitle line to listen again and catch what you missed ▸ Edit, copy and save useful subtitle lines ▸ Learn from individual parts of Bilibili videos 💬 Understand what you read ▸ Open the AI assistant beside your current webpage ▸ Translate selected text or readable page content ▸ Summarize articles and pull out the main ideas ▸ Ask about unfamiliar expressions, difficult sentences or specialist terms ▸ Rewrite text to make it clearer, simpler or more natural ▸ Select a screenshot area to ask about text you see ▸ Return to previous conversations when you want to revisit an explanation 📚 Build your own vocabulary library ▸ Save words, phrases and sentences from real content ▸ Keep the examples that matter to you, rather than studying isolated word lists ▸ Organize saved material into collections ▸ Sync your learning library with your DejaVocab account ▸ Review saved vocabulary in the DejaVocab iOS and Android apps ▸ Choose Mainland or International services to access the corresponding account and learning data 🧠 Find expressions by meaning With Intuition Network, search your saved phrases by the idea you want to express — even when you cannot remember the exact words. Rediscover useful language from your own library and connect new learning with expressions you already know. Intuition Network availability and usage limits depend on your subscription. ✨ Make learning part of your day Watch something interesting. Read an article. Look up a word, replay a sentence, or save an expression you want to use later. DejaVocab brings these small learning moments into one place. An English and Simplified Chinese interface is available. A free account lets you get started; some AI features and cloud transcription require an eligible plan or available usage allowance. Subtitle availability varies by video. 🔒 Your content and account Translation, AI explanations and cloud transcription use online services to process the content needed for the feature. Saved vocabulary and conversation history are associated with your DejaVocab account. Mainland and International services use separate sign-in sessions. 🚀 Getting started 1. Install DejaVocab and open it from the Chrome toolbar. 2. Sign in or create an account. 3. On a supported YouTube or Bilibili video, click the DejaVocab button in the player to open the learning view. 4. On other webpages, select text or open the side panel to translate, explain, summarize or save. Website: https://dejavocab.com Support: longhao@dejavocab.com