JargonLens: YouTube Jargon Explainer

Understand technical, financial, and industry terms in YouTube videos with timely, plain-English definitions.

JargonLens reads the captions of the video you're watching and shows a plain-English definition the moment each specialist term is spoken. No pausing, no second tab It identifies technical, financial, business, and industry terms in captioned videos and shows plain-English definitions when they are spoken. JargonLens is a YouTube jargon and slang explainer that identifies technical, financial, business, scientific, and industry terms—plus context-dependent slang and idioms—in captioned videos. It shows a concise plain-English meaning when each expression is spoken. Stay focused on the video instead of opening new tabs whenever a speaker uses unfamiliar terminology or a non-literal phrase. JargonLens uses the surrounding captions to explain what slang and idioms mean in that specific context. Features include timely definition overlays, context-aware slang and idiom meanings, longer explanations on demand, searchable video glossaries, timestamp navigation, known-term filtering, and locally stored recent glossaries. Stay focused on the video instead of opening new tabs every time a speaker uses unfamiliar terminology. Features: • Timely definition overlays appear about one second before a term is spoken. • Click an overlay to pause its timer; click again to continue. • Double-click a definition to request a longer plain-English explanation. • Open a searchable glossary containing terms for the current video only. • Click a glossary term to jump to the exact moment it appears. • Choose whether repeated terms appear once or again when occurrences are at least 30 seconds apart. • Mark familiar terms as known so JargonLens stops showing them. • Revisit up to 20 recent video glossaries stored locally in Chrome. • Clear locally cached analyses at any time. JargonLens supports public English YouTube videos that have existing captions. Transcript availability depends on the caption provider. JargonLens is intended only for users aged 18 or older.