Spline AI is the artificial intelligence component of Spline, a web-based 3D design tool that enables designers and developers to create interactive 3D content directly in the browser. Founded in 2020, Spline uniquely combines 3D design, AI generation, and web publishing in a single platform, replacing code-heavy workflows with a visual editor. Text-to-3D object generation converts natural language descriptions into three-dimensional models, while image-to-3D conversion extracts dimensional models from 2D reference images. Beyond AI generation, Spline provides powerful tools for interactive 3D experiences: physics simulation, mouse and touch interactions, state machines, and animation timelines within the browser. Real-time collaboration enables multiple designers to work simultaneously on the same scene. Professional visuals are supported through a custom shader editor, post-processing effects, and advanced lighting tools. Generated objects can be edited directly with materials, textures, animations, and interaction rules defined without code. Output deploys as embeddable iframes, standalone applications, or exported 3D files, with official libraries for React, Next.js, and vanilla JavaScript ensuring seamless web integration. Spline AI targets web designers, UI/UX professionals, front-end developers, marketing teams adding interactive 3D to product pages, and game prototypers. The free plan offers unlimited projects with basic exports, while Pro provides higher resolution, custom domain publishing, expanded AI quotas, and team collaboration. Spline offers a browser-based alternative to heavy desktop applications like Blender while bridging the gap between design and development for interactive 3D web content.