Semantic UI

The UI Framework for the AI Era

Agents write it. Browsers run it. Humans read it.

A web component framework with signals, expressive templates, and an off-the-shelf UI kit. No build step from generation to execution.

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Designed for Agents
Machine-readable specs translate natural language to valid, composable UI code.
No Build Necessary
Signals, expression evaluation, and modern ESM running directly in the browser.
Complete UI Library
A full component library with composable primitives and JIT Tailwind in Shadow DOM.

See It In Action

Card Search Temperature Converer Ball Simulation Spectrum Analyzer