Spline

Spline is a 3D design tool in the browser for creating interactive 3D for websites and apps. It is built for teams that want to model, animate, review, and ship scenes together in one file.

It includes modeling with primitives, booleans, sculpting, and 3D generation, plus materials, lights, post-processing, animation, events, and physics. Changes land as operations in a live file, so teammates can comment, undo, or take over without rebuilding. Scenes can be published to the web, embedded, exported as code, or shipped natively to iOS and Android.

Spline also supports agent-driven workflows through MCP. You can connect an agent to read the scene, write changes, frame views, and build inside the editor. Paid plans add AI credits, watermark-free exports, higher export resolution, folders, video export, and more.