Butterchurn

About

WebGL implementation of the MilkDrop visualiser that runs MilkDrop presets in the browser.

Butterchurn is a JavaScript reimplementation of MilkDrop that renders presets with WebGL 2 and reads audio through the Web Audio API. It is both a library for developers and a usable web visualiser at butterchurnviz.com.

It is the visualiser engine behind Webamp's MilkDrop window and has been used in DJ streaming platforms, self-hosted music servers, karaoke software and browser extensions. The code is MIT licensed.

Features & Use Cases

• MilkDrop presets in the browser
• WebGL 2 rendering
• npm package for developers
• Microphone or audio element input
• MIT licensed

Pricing

Free and open source.

Sources

• github.com
• butterchurnviz.com

Pricing checked 3 October 2026. Preview from butterchurnviz.com, retrieved 3 October 2026.