Matthijs Groen

Matthijs Groen is an independent Dutch developer focused on bringing high-quality animation tooling to the open-source community. His flagship project, Geppetto, is a browser-based motion-design environment that lets designers and front-end engineers craft WebGL-powered sprite, skeletal and timeline animations without leaving the web page. Typical use-cases range from interactive hero banners, product configurators and data-storytelling infographics to short looping backgrounds for online magazines or educational demos that must start instantly on mobile and desktop. The editor imports layered SVG, PNG or JSON artwork, provides key-frame curves, easing presets and real-time preview, then exports standards-compliant glTF or self-contained ES-modules that drop into React, Vue, WordPress or plain HTML. Because the runtime is only a few kilobytes and renders through WebGL, files stay small, frame-rates stay high, and no plug-ins are required. Designers appreciate the familiar timeline interface, while developers value the clean API that exposes playback control, event callbacks and responsive scaling. The project is actively maintained, documented and MIT-licensed, encouraging studios and freelancers to extend it for bespoke character rigs, UI micro-interactions or dynamic ad creatives. Matthijs Groen’s software is available for free on get.nero.com, where downloads are delivered through trusted Windows package sources such as winget, always install the latest release and can be queued for batch installation alongside other applications.