3D Music Visualizer
Spotify needs a free developer app (one-time, about two minutes):
open the Spotify developer dashboard, create an app,
add as a Redirect URI, tick Web API and Web Playback SDK, then paste its Client ID here.
The visualizer becomes a Spotify Connect speaker, so you can pick songs from the Spotify app on your phone. In-page playback needs Spotify Premium.
Video and playlist links both work. Some videos don't allow embedding.
Capture PC audio: choose Entire screen and turn on Share system audio. A phone can stream to this PC over Bluetooth or AirPlay, or plug into the line-in.
Now playing
Style
Play with it: drag the picture to turn it, Ctrl+scroll or pinch to zoom, double-click (or R) to reset. Tap the things flying at you to pop them, or swipe fast to swat them aside. Tapping empty space makes each style react.
How the music gets in, and privacy
- Spotify and YouTube: the music plays inside this page. Their audio is protected, so the page can't read it directly; instead it listens to its own tab. When Chrome asks, pick This tab and keep Share tab audio on. It's one click per session.
- Spotify from your phone: after connecting, open Spotify on the phone, tap the speaker icon and choose 3D Music Visualizer, then press Play here & listen (or just Listen) on this page.
- Any other app: Other sources → Capture PC audio with "Share system audio" on.
Keys: 1–5 styles · ← → previous/next · Space play/pause · V next layout · A auto-cycle styles · F full view · Esc exit. Audio is only analyzed in this page. Nothing is recorded or uploaded. Service sign-ins stay in this browser.