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Semantic UI

A CSS and JavaScript UI component framework built around theming and readable HTML.

GitHub Download 2.5.0
Stars
51k
Forks
4.8k
Licence
MIT
Language
JavaScript
Last update
1.9 years ago
Type
Library

No commits in over a year — check for forks or alternatives before adopting.

What it is

Semantic UI is a front-end framework that provides ready-made interface pieces such as buttons, menus, grids, dropdowns and popups, styled with CSS. Its README describes it as designed for theming, with many customizable CSS variables and a layered system where settings can be inherited and overridden. It is meant to help developers build responsive web pages using simple HTML markup and JavaScript.

  • Build a responsive marketing or company website with ready-made buttons, grids and menus
  • Create a themed dashboard by overriding Semantic's CSS variables
  • Add dropdowns, popups, tooltips and sidebars to an existing web app
  • Use the CSS-only package in a page that does not use a JavaScript build step

Great for

  • Front-end developers who want prebuilt UI components they can restyle with themes
  • Teams building responsive websites that need to work across many devices
  • Developers integrating a UI layer into React, Angular, Meteor or Ember projects
  • Projects that want to customize the look through CSS variables rather than rewriting styles

Not ideal for

  • Projects that must support Internet Explorer 9 or older browsers, because the README says grids and flexbox components may not display correctly there
  • Developers who want the newest component approach; the latest release noted in the README is from October 2022 and the last push was November 2024, so activity may be slower than mainstream alternatives
  • Anyone who needs a support forum on GitHub, since the README asks users to avoid usage questions in Issues and to use Gitter or StackOverflow instead
Step-by-step guide: how to use Semantic UIInstall, first run, examples, tips and FAQs
Semantic UI alternativesBootstrap vs Semantic UISemantic UI vs Tailwind CSSMaterial UI vs Semantic UIFloating UI vs Semantic UISemantic UI vs SweetAlert

How to get it

  1. 1

    Install with a package manager

    You'll need: Node.js (version 18 is mentioned as compatible in the README) · npm

    Install the full framework with npm

    npm install semantic-ui

    Install the CSS-only package instead

    npm install semantic-ui-css
  2. 2

    Run it

    • Install the package with npm install semantic-ui, or use the CSS-only package if you only need styles
    • Run the interactive installer mentioned in the README to set up your project
    • Include the Semantic UI CSS and JavaScript in your HTML page
    • Add a component such as a button or menu using the classes shown in the getting started guide
  3. 3

    Get the most out of it

    • Customize the look with theme files and CSS variables, following the theming guide linked in the README
    • Use the integration wiki for framework bindings such as React or Angular
    • Use the right-to-left option in the build tools if your site needs RTL layout
    • Check the Chinese mirror site or translation guides if you need localized documentation

Downloads

Source code (.zip)master branch · straight from GitHubRelease 2.5.0Release notes and sourceOfficial website & docswww.semantic-ui.com

Strengths

  • Large set of prebuilt components (the README lists 50+ UI elements) with many CSS variables for theming
  • Uses MIT license, which permits free commercial and personal use
  • Includes official packages for CSS-only, LESS and several frameworks

Trade-offs

  • The README points to a 2022 release as the most recent, and browser support for older systems is limited
  • Relies on a build workflow (Gulp, Node) for full customization, which adds setup work for beginners
  • Documentation and community support are linked to external sites, so answers may be spread across several places

How it compares

ProjectStarsTypeLevelUpdatedBest for
Semantic-UI (this)51kLibrarybeginner1.9 years agoFront-end developers who want prebuilt UI components they can restyle with themes
bootstrap175kLibrarybeginner4 days agoDevelopers building responsive websites or web app interfaces quickly
tailwindcss98.3kLibraryintermediate4 days agoWeb developers who build their own interfaces and want to avoid writing large custom stylesheets
material-ui99.3kLibraryintermediate4 days agoReact developers who want a consistent, prebuilt set of UI components
bulma50kLibrarybeginner2 months agoDevelopers who want a quick, consistent styling baseline for a web page
tippyjs12.2kLibraryintermediate2.4 years agoWeb developers who want ready-made tooltips or dropdown menus without building them from scratch

Stats synced from GitHub. The assessment above was drafted with AI from the project's README on 2026-10-29 and may miss recent changes — check the README before relying on a command. MIT licence: free to use, modify and distribute, including commercially, as long as you keep the copyright notice.