YouTube Light Visualizer

Real-time music-reactive light visualizer for YouTube. Beat detection, multi-band EQ, 4 scenes.

Real-time music-reactive light show that overlays directly on YouTube videos, syncing colors and effects to the beat. Overlays a music-reactive light show directly on any YouTube video. No microphone needed — it taps the video's audio stream directly. Features: - 4 visual scenes: Club sweep, Laser grid, Strobe, Particle rain - 7 color schemes: Warm, Cold, Fire, Arctic, Neon, Auto, Rainbow - Real-time beat detection using spectral flux onset analysis - Live BPM estimation with median filter - Multi-band EQ meters (Sub, Bass, Mids, Highs) - Adjustable sensitivity and opacity - Settings saved between sessions How to use: 1. Open any YouTube video and press play 2. Click the ◈ Light Viz button (bottom-right of page) 3. Click ⚙ to change scene, colors, and sensitivity