# Once UI System Core (Design systems)

> Once UI System Core is a free, open-source design system built with React and Next.js. The open-source frontend infrastructure for the AI-native web. It has 267 GitHub stars and is released under the MIT license. A live demo is linked from this page.

The open-source frontend infrastructure for the AI-native web The indie design system for Next.js apps Learn how to set up and build with Once UI at docs.once-ui.com.

## Key facts

| Fact | Value |
|---|---|
| Repository | https://github.com/once-ui-system/core |
| Built with | React, Next.js, TypeScript |
| Live demo | https://once-ui.com |
| GitHub template repository | no |
| GitHub stars | 267 |
| License | MIT |
| Language | TypeScript |
| Official | no |
| Category | Design systems |
| Latest release | v2.0.0 (Sep 25, 2026) |
| Last commit | Sep 25, 2026 |

## Get started

### Copy with degit

```sh
npx degit once-ui-system/core my-ui
cd my-ui
npm install   # then run the dev script from the README
```

### Or clone with git

```sh
git clone --depth 1 https://github.com/once-ui-system/core.git my-ui
```

Commercial use depends on the MIT license. Sources: https://docs.github.com/en/repositories/creating-and-managing-repositories/creating-a-repository-from-a-template, https://github.com/Rich-Harris/degit

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