Spline

Spline is a 3D design tool built specifically for creating interactive 3D graphics and animations that can be embedded directly on websites and in products, aimed at designers who want to add real-time 3D elements without needing a background in traditional 3D software or a game engine. Its interface is intentionally approachable compared to professional 3D tools like Blender, using a simplified toolset for modeling, texturing, lighting, and animation that lets product and web designers create polished 3D scenes without a steep learning curve. Scenes built in Spline can be exported and embedded directly into a website or app with real-time interactivity, meaning a 3D object can respond to a visitor's mouse movement or scroll position rather than existing only as a rendered video or static image. Real-time multiplayer collaboration lets multiple designers work on the same 3D scene simultaneously, similar to how modern 2D design tools support live collaboration, which is still uncommon in the 3D design space. Spline also includes a growing library of pre-built 3D assets, materials, and templates, so designers don't need to model every object from scratch to build a compelling scene. It's popular with product and marketing teams building landing pages, product showcases, and app interfaces that want to stand out with interactive 3D rather than flat, static visuals.