YouTube Lexify

Understand Every Word. Instantly.

Lexify turns YouTube into a language learning tool. While you watch any video with subtitles, simply hover over any word you don't recognize and an instant definition card appears — right on screen, without leaving the video. How it works Enable subtitles on any YouTube video. Lexify highlights words as they appear. Hover to see a contextual AI-powered definition tailored to how the word is used in that exact sentence. Features • Instant definitions — hover any subtitle word, no clicking or tab switching • AI-powered context — definitions are specific to how the word is used, not just generic dictionary entries • Auto vocabulary tracker — every word you look up is saved to your personal dashboard with the video timestamp and sentence it appeared in • Export to Anki, CSV, or JSON — study your saved words on any device • Works on any YouTube video with subtitles Who is it for? Language learners, students, professionals watching educational content, or anyone who wants to expand their vocabulary naturally through video. Sign in to sync your vocabulary across devices and access your personal word dashboard at lexify.app.