EmeraldLens - The #1 Free YouTube Note Taker & Video Study Tool
Turn Watching into Learning. EmeraldLens is the cleanest, privacy-first way to study YouTube videos. Capture timestamps, organize your thoughts, view visual note density heatmaps, and export directly to Notion, Obsidian, and PDF without your data ever leaving your browser.
Core Features
- Clickable Timestamps: Notes sync directly with video playback.
- Smart Auto-Pause: Automatically pauses the video when you type so you never miss a lecture concept.
- Visual Timeline Heatmap: See where note activity concentrates across long lectures and tutorials.
- Rich Markdown & WYSIWYG: Format notes with bold, lists, and syntax-highlighted code blocks.
- Full Dark & Light Mode: Study comfortably day or night with instant theme switching.
- 100% Privacy: No login required; all study notes stay in your browser local storage.
- Export Anywhere: Save as Markdown for Obsidian/Notion, PDF, or PowerPoint.
Frequently Asked Questions
How do I take notes on YouTube videos?
Paste any YouTube URL into EmeraldLens and press Start. Notes can be typed as you watch and auto-sync with video timestamps.
Is EmeraldLens free?
Yes, EmeraldLens is completely free for local study sessions with no limits on videos or notes.
Created by Sethi De Clercq. Visit EmeraldLens to start studying.