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. MensorAI adds a sidebar to YouTube where you can take notes while you watch, ask the AI questions about the video, and find anything you’ve learned later. No switching tabs. No pausing to scribble things down. HOW IT WORKS Open any YouTube video Write notes in the sidebar — timestamps are added automatically Type /ask-ai to ask the AI anything about the video Everything syncs to mensorai.com, searchable from any device WHAT’S INSIDE 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. Timestamped notes Every note links back to the exact moment in the video it came from. Click to jump straight there. 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/