I built a 3D audio visualizer and monetized it with Lemon Squeezy in a week

If you’ve ever wanted to turn music into a visual — and get paid for it — here’s how I built and shipped exactly that in a week. A week ago, I had a working Three.js audio visualizer sitting on my local machine with no monetization plan. Today, it’s live on Netlify, approved by Lemon Squeezy, and accepting paid subscribers at $9/month. Here’s exactly how I did it — including the pivot I had to make halfway through. What I built 3D Audio Visualizer Pro is a browser-based app that takes audio input (microphone or file upload) and renders it as real-time 3D visuals using Three.js and the Web Audio API. It also lets you export the visuals as a video file (WebM/MP4) — which turned out to be the key to monetization. 👉 Live demo Three scenes are included: Sphere — expands and rotates with volume Bars — 32 rainbow frequency bars Particles — 500 particles that accelerate with the beat The pivot: Chrome Extension → Web App (first) I originally built this as a Chrome extension — and I’m still wo