Spline 3D

Spline AI is a text-to-3D and image-to-3D generation feature built into the Spline design platform, letting users create 3D objects and scenes by describing them in a prompt or uploading a 2D image instead of modeling by hand. A single prompt produces four variants within seconds, and any result can be remixed to explore further variations before it's dropped into Spline's regular 3D editor for refinement. Because the generated objects land directly in Spline's existing editor, they're immediately editable alongside hand-built assets, and users can build up a personal library of generated 3D content over time. The feature is aimed at people without traditional 3D modeling experience, such as designers and beginners who want to prototype scenes quickly rather than learn a modeling tool from scratch. Spline also exposes this functionality through a developer API, distributed as the @splinetool/runtime NPM package with documentation at docs.spline.design, and supports publishing generated 3D content to the web as embeddable code, as well as to iOS and Android through Swift and Kotlin snippets. One limitation worth noting is that pricing and free-tier limits for the AI generation feature specifically are not detailed on the page itself, so usage costs may only become clear once inside the editor.