OpenUI
Open-source prompt-to-UI component generator
Developers who want a free, self-hostable tool for generating UI components from prompts
Founded 2024 · USA
Good Fit If You're...
Rapid UI component prototyping
Frontend developers who need to quickly explore visual ideas can describe a component in natural language and see it rendered live, iterating faster than hand-coding from scratch.
Exploring UI variations with different AI models
Developers evaluating LLMs can swap between OpenAI, Claude, Gemini, or local models to compare the quality and style of generated UI components side by side.
Learning and teaching frontend development
Students and educators can describe UI elements in plain English and inspect the generated HTML/CSS/JS to understand how components are built.
Converting quick mockups to framework components
After generating a UI component you like, convert it to React, Svelte, or Web Components and drop it into your existing codebase as a starting point.
Pricing
| Plan | Price | Credits |
|---|---|---|
| Free | $0 | Fully open-source (MIT license), Self-host with your own API keys, Hosted demo at openui.fly.dev |
Hidden costs to be aware of:
- Requires your own LLM API keys (OpenAI, Anthropic, etc.)
- Self-hosting infrastructure costs if not using the demo
Pricing last verified: 2026-04-04
Strengths & Limitations
Strengths
- +Completely free and open-source with 21k+ GitHub stars
- +Supports 100+ LLMs via LiteLLM — including local models through Ollama
- +Converts generated HTML to React, Svelte, and Web Components
- +No vendor lock-in — self-host or use the hosted demo
Limitations
- -Output quality depends heavily on which LLM you use
- -Generates individual UI components, not full applications or pages
- -No built-in deployment, hosting, or backend integration
- -Requires technical setup for self-hosting; demo has rate limits
How It Compares
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Last updated: 2026-04-04