Introduction
Bulma is a free, open source framework that provides ready-to-use frontend components that you can easily combine to build responsive web interfaces.
The Modern CSS Framework: 100% Responsive, designed mobile-first. Modern: Flexbox + Grid + CSS Variables. Easy: Download. Customize. Done. Free: Open Source on GitHub.
Bulma includes CSS Variables, Dark Mode, Light Mode, Dart Sass, Flexbox, Modular components, Responsive design, Smart Grid, Auto Color, Skeletons, and Themes.
No CSS knowledge required! Just add columns, they will resize themselves. Bulma columns are vertical by default. While it's possible to add as many columns as you want, it is recommended to stick with 12 columns. If you want smaller divisions, you can always nest columns.
“Simple, easily customizable and doesn't impose Javascript implementations.”
CSS frameworkFlexboxResponsive designCSS VariablesDark modeDart SassSmart GridOpen source
Screenshots
Deployment
CDN
适合快速在静态页面或原型中直接引入 Bulma 的已编译 CSS，无需本地构建流程。
npm 包
适合在现代前端项目中通过包管理器安装 Bulma，并交由构建工具统一打包发布。
下载文件
适合不使用包管理器或构建工具的项目，直接下载 Bulma 文件后随站点静态资源一起部署。
Sass 源码自定义构建
适合需要在发布前覆盖 Bulma Sass 变量、裁剪模块或定制主题的项目。
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Details
Type Open-source software
License MIT
Last verified 2026-07-18
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