OpenUI

OpenUI is Weights & Biases' open-source tool that turns a written UI description into live HTML and framework code.

OpenUI is an open-source prototype from W&B for describing a user interface in words and watching HTML render live, then asking for changes and converting the result to React, Svelte, Web Components and other targets. The authors compare it to v0, with the caveat that it is less polished. It can call OpenAI, Groq, Gemini, Anthropic, Cohere, Mistral, any OpenAI-compatible endpoint and Ollama (for example Llava). Docker is the preferred local install. A hosted demo is linked from the repository. Environment variables select which model keys are available in the UI.

OpenUI at a glance

Best for: Software engineer, Designer
Runs on: open source, Web, self-hosted
Pricing: Free and open source; model APIs are billed by their providers
Released: March 2024
Category: AI coding tool
Website: openui.fly.dev

Key features

Describe a UI and see HTML render live
Convert HTML to React, Svelte or Web Components
OpenAI, Groq, Gemini, Anthropic, Cohere and Mistral
OpenAI-compatible endpoints and Ollama
Docker-based local install
Hosted demo linked from the repo

Use it for

Sketch a settings page in words and iterate live
Export a generated layout to React
Try a local Llava model instead of a hosted API

Alternatives to OpenUI

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Chai UI — Open-source React and Vue components for AI apps with model routing and prompt optimization.
OpenRouter — Access over 500 models and 80 providers through one unified API.
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OpenSandbox — Provides isolated environments with multi-language SDKs and lifecycle management.
EditUI — Eliminates manual annotation and selector identification for UI edits.
AG-UI — Standardizes agent-user interactions and generative UI for applications.
openGym — Zero subscriptions, accounts, or telemetry, with support for bring-your-own AI coaching.
OpenSumi — It supports VS Code plugins and provides a flexible, modular architecture.
Libraries.dev — Prompt-based UI libraries that coding agents can install and configure directly
iwant — Spins up cloud GPUs and open models instantly via a single command.

All OpenUI alternatives