A Julia set uses the iteration z → z² + c with c held constant while the starting value varies across the plane. Each constant c produces a different swirling, often symmetric, fractal pattern.

Can I set my own Julia constant?

The visualizer animates a curated constant rather than exposing a free-form c input. It is built for live, audio-reactive motion on stream rather than static parameter exploration.

How is a Julia set related to the Mandelbrot set?

They share the z → z² + c formula. The Mandelbrot set varies c from a fixed start; a Julia set fixes c and varies the start. Each point of the Mandelbrot set corresponds to a distinct Julia set.

Is it free, and do I need to install anything?

Yes, it is free at 720p with a watermark, and there is nothing to install — it runs in a browser tab and adds to OBS as a Browser Source. Paid tiers unlock 1080p and 4K.

Does it react to music?

Yes. The Julia pattern flows, pulses, and shifts color with bass, mid, and treble in real time via the Web Audio API.

AUDIO-REACTIVE VISUAL · UPDATED 2026-06-04

Julia Set Visualizer Online

Name: Vortexia
Rating: 4.8 (127 reviews)
Author: Yusuf @ Vortexia

Animated Julia fractals that react to your music

Vortexia is a free online Julia set visualizer that renders animated Julia fractals live in your browser with GPU acceleration. The pattern flows and reacts to your music in real time — add it to OBS as one browser source. No install.

Open the dashboard · Watch it live · All presets · Pricing

What is Julia Set Visualizer Online?

Vortexia is a free online Julia set visualizer that renders animated Julia fractals live in your browser on the GPU (WebGL2). A Julia set uses the same z → z² + c iteration as the Mandelbrot set, but holds c fixed and varies the starting point across the screen, producing swirling, often symmetric patterns. Vortexia animates a curated Julia constant and computes the set every frame, so the pattern flows, shifts color, and reacts to your music in real time through the Web Audio API. To put it on stream, pick the look at vortexia.live/demo and paste a single Browser Source URL into OBS, Streamlabs, Kick, Twitch, YouTube Live, or TikTok Live — no download, no plugin. The free tier renders at 720p with a watermark; paid tiers unlock 1080p, 4K, and custom shaders.

How to use Julia Set Visualizer Online

Open the Julia view. Go to vortexia.live/demo and select the Julia engine, then enable audio to watch the pattern flow with your music.
Add it to OBS. In OBS or Streamlabs, add a Browser Source and paste your Vortexia viewer URL. Set it to 1920x1080 to match your canvas.
Layer and go live. Place the source behind your webcam and game capture so it becomes a living background, then start streaming.

Specs & output

Engine	Julia
Render Mode	flux
Iteration Depth	95
Default Zoom	1.00
Colour Shift	180°
Output (Free)	720p / 30fps + watermark
Output (Plus)	1080p / 60fps, no watermark
Output (Pro)	4K / 60fps, custom shader uploads
Audio Source	Browser tab audio (FFT, real-time)
Last Updated	2026-06-04

Frequently asked questions

What is a Julia set?: A Julia set uses the iteration z → z² + c with c held constant while the starting value varies across the plane. Each constant c produces a different swirling, often symmetric, fractal pattern.
Can I set my own Julia constant?: The visualizer animates a curated constant rather than exposing a free-form c input. It is built for live, audio-reactive motion on stream rather than static parameter exploration.
How is a Julia set related to the Mandelbrot set?: They share the z → z² + c formula. The Mandelbrot set varies c from a fixed start; a Julia set fixes c and varies the start. Each point of the Mandelbrot set corresponds to a distinct Julia set.
Is it free, and do I need to install anything?: Yes, it is free at 720p with a watermark, and there is nothing to install — it runs in a browser tab and adds to OBS as a Browser Source. Paid tiers unlock 1080p and 4K.
Does it react to music?: Yes. The Julia pattern flows, pulses, and shifts color with bass, mid, and treble in real time via the Web Audio API.

About the author

Yusuf @ Vortexia — Vortexia Engine Creator.

Yusuf builds Vortexia — a browser-based, GPU-accelerated audio-reactive visual engine used by streamers and DJs on Twitch, Kick, YouTube Live and TikTok Live.