Lexpresso

Lexpresso is a Chrome extension that transforms any YouTube video into ready-to-study flashcards in seconds. Just click once while watching a video, and it automatically extracts vocabulary, filters it by your CEFR level (A1–C2), and generates complete cards with definitions, example sentences, translations, and so on. Each card includes a timestamp deeplink back to the exact moment in the video, so you can always review words in their original context. Built-in spaced repetition powered by the FSRS algorithm helps you retain what you learn with minimal effort. What used to take 2 hours of manual card creation now takes about 1 minute. Try 3 decks free — no credit card required.