# iTwinUI

Design system from Bentley Systems with a React component library, CSS and design-token packages.


Source: https://findsoftware.frbit.cloud/itwinui/
Last reviewed: 2026-10-27
Updated: 2026-10-28
Listed since: 2026-10-27

## Record

### Links

- home: https://itwinui.bentley.com
- repository: https://github.com/iTwin/iTwinUI
- docs: https://itwinui.bentley.com/docs

### Identity

- status: active
- maintainer: Bentley Systems, Incorporated
- maintainerType: company
- parent: unknown
- firstRelease: 2021
- hqCountry: unknown

### Kind

- category: ui-library
- hosting: not applicable
- language: javascript
- runtime: unknown
- runtimeMin: not applicable
- basedOn: react

### Content

- contentStore: not applicable
- databases: not applicable
- adminUi: not applicable
- headlessApi: not applicable
- templating: not applicable
- i18n: not applicable

### Rendering and deploy

- runsAs: not applicable
- renderingModes: not applicable
- installMethod: npm

### License

- licenseModel: open-source
- license: MIT

### Releases

- currentMajor: 3
- latestReleaseDate: 2026-09-17

### Adoption

- githubStargazers: 125
- packagistDownloads: not applicable
- npmWeeklyDownloads: 81088
- contributors: 53
- pluginCount: unknown
- packagistMonthlyDownloads: unknown
- ecosystemsMonthlyDownloads: unknown
- httpArchiveSites: unknown
- wordpressActiveInstalls: unknown
- dependentRepos: 26
- dependentPackages: 40

### Sources

- urls: https://itwinui.bentley.com/ (read 2026-10-27)
- urls: https://api.github.com/repos/iTwin/iTwinUI (read 2026-10-27)
- urls: https://github.com/iTwin/iTwinUI/blob/main/apps/website/src/content/docs/index.mdx (read 2026-10-27)
- firstRelease: https://registry.npmjs.org/@itwin/itwinui-react (read 2026-10-27)
- maintainer: https://github.com/iTwin/iTwinUI/blob/main/LICENSE.md (read 2026-10-27)
- maintainerType: https://github.com/iTwin/iTwinUI/blob/main/LICENSE.md (read 2026-10-27)
- language: https://api.github.com/repos/iTwin/iTwinUI/languages (read 2026-10-27)
- category: https://github.com/iTwin/iTwinUI/blob/main/README.md (read 2026-10-27)
- basedOn: https://github.com/iTwin/iTwinUI/blob/main/packages/itwinui-react/README.md (read 2026-10-27)
- installMethod: https://github.com/iTwin/iTwinUI/blob/main/apps/website/src/content/docs/index.mdx (read 2026-10-27)
- license: https://github.com/iTwin/iTwinUI/blob/main/LICENSE.md (read 2026-10-27)
- currentMajor: https://github.com/iTwin/iTwinUI/releases/tag/%40itwin%2Fitwinui-react%403.22.0 (read 2026-10-27)
- latestReleaseDate: https://github.com/iTwin/iTwinUI/releases/tag/%40itwin%2Fitwinui-react%403.22.0 (read 2026-10-27)
- githubStargazers: https://api.github.com/repos/iTwin/iTwinUI (read 2026-10-27)
- contributors: https://api.github.com/repos/iTwin/iTwinUI/contributors (read 2026-10-27)
- npmWeeklyDownloads: https://api.npmjs.org/downloads/range/2026-09-28:2026-10-04/@itwin/itwinui-react (read 2026-10-28)
- dependentPackages: https://packages.ecosyste.ms/api/v1/registries/npmjs.org/packages/@itwin%2Fitwinui-react (read 2026-10-27)
- dependentRepos: https://packages.ecosyste.ms/api/v1/registries/npmjs.org/packages/@itwin%2Fitwinui-react (read 2026-10-27)

## Notes

iTwinUI is a design system from Bentley Systems for web interfaces in Bentley and iTwin.js applications. It comes as three npm packages: CSS for every component, CSS variables for the design tokens, and a React component library that builds on the CSS. The documentation covers the React package, which is installed with npm.

## Worth knowing

The README says iTwinUI is in maintenance mode, with StrataKit replacing it as the primary design system. A migration guide and a theme bridge for running both libraries side by side are linked from the README.

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Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Attributes are recorded, never scored; absent means unknown.
Credit, in full: FindSoftware, CC BY 4.0