The Bootstrap Framework
Learn moreAbout Bootstrap
Open Source
Bootstrap is an open source toolkit for developing with HTML, CSS, and JS. Quickly prototype your ideas or build your entire app with our Sass variables and mixins, responsive grid system, extensive prebuilt components, and powerful plugins.
Mobile First
Bootstrap includes a powerful mobile-first flexbox grid to build layouts of all shapes and sizes thanks to a twelve column system, five default responsive tiers, Sass variables and mixins, and dozens of predefined classes.
Components Library
Bootstrap comes with an extensive components library that includes buttons and lists to carousels and modals. Components are easy to integrate into any site and require no knowledge of JavaScript to use.
Sample Components
Alerts
Provide contextual feedback messages for typical user actions with the handful of available and flexible alert messages.
Buttons
Use Bootstrap's custom button styles for actions in forms, dialogs, and more with support for multiple sizes, states, and more.
Getting Started
Getting starter with Bootstrap is so easy, just add the code below to your <head> of
your
HTML and you will be on your way.
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/css/bootstrap.min.css">