MensorAI: AI Note Taker for YouTube

Free transcript viewer, notes, and AI Q&A for any YouTube video. Build a searchable library of everything you watch.

Turn YouTube into a library you can actually search. No signup required. Install the extension and start using the transcript viewer and notes editor immediately. Your notes save locally. Sign in when you're ready to unlock AI features and sync across devices. HOW IT WORKS Open any YouTube video Read the full transcript and take notes in the sidebar — no account needed Timestamps are added to your notes automatically Sign in to unlock AI features, Speed Mode, and cross-device sync WHAT'S INSIDE Transcript viewer Read the full transcript of any video right in the sidebar. Click any line to jump to that moment. Timestamped notes Every note links back to the exact moment in the video it came from. Click to jump straight there. Speed Mode Pick any video and MensorAI pulls out the key insights, quizzes you on them, and helps you walk away with notes worth keeping. Takes about 5 minutes. AI that actually knows the video Ask anything and get an answer based on the full transcript, not a generic response. Rich text editor Slash commands for headings, bullets, and AI. Feels like a lightweight Notion, inside YouTube. Searchable library All your notes, across every video, in one place. Search by keyword, channel, or topic at mensorai.com. Works on Brave, Arc, and Edge too Any Chromium browser supports the extension. GOOD FOR Students, developers, researchers, and anyone who learns from video and wants to actually hold on to what they watch. Companion to https://www.mensorai.com