Vercel has open-sourced json-render, a framework that enables AI models to create structured user interfaces from natural language prompts. Released under the Apache 2.0 license, it supports multiple

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Vercel has open-sourced json-render, a 'Generative UI' framework that lets AI models generate structured user interfaces from natural language prompts. Developers define a catalog of permitted components using Zod schemas, and an LLM produces a constrained JSON specification that the framework renders progressively. It supports React, Vue, Svelte, Solid, React Native, and more, and ships with 36 pre-built shadcn/ui components plus packages for PDF, email, video, and 3D. Community reaction is mixed: some see it as a meaningful step toward runtime UI composition, while others question why it reinvents existing standards like OpenAPI or JSON Schema. Google has a comparable project called A2UI, though the two differ in scope — json-render is tightly coupled to an app's component set, while A2UI aims to be a cross-agent interoperability protocol.

Vercel Releases JSON-Render: A Generative UI Framework for AI-Driven Interface Composition