Build responsive, mobile-first projects on the web with the world's most popular front-end component library.

Built with ease.

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 built on jQuery.

HTML5

Built with the latest version of HTML, HTML5.

BOOTSTRAP

Built with the latest version of Bootstrap, Bootstrap 4.

CSS3

Built with the latest version of CSS, CSS3.

Quick Overview

Components and options for laying out your Bootstrap project, including wrapping containers, a powerful grid system, a flexible media object, and responsive utility classes.

Since Bootstrap is developed to be mobile first, we use a handful of media queries to create sensible breakpoints for our layouts and interfaces.

Several Bootstrap components utilize z-index, the CSS property that helps control layout by providing a third axis to arrange content.


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Meet the Team

Mike Rophone

Mike is an experience researcher with almost 10 years of experience.

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Penny Coin

Penny is a designer with almost 10 years of marketing and advertising experience.

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Phil Osophy

Phil is a developer with almost 10 years of web development experience.

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Background & History

Bootstrap is maintained by a small team of developers on GitHub. We’re actively looking to grow this team and would love to hear from you if you’re excited about CSS at scale, writing and maintaining vanilla JavaScript plugins, and improving build tooling processes for frontend code.

Originally created by a designer and a developer at Twitter, Bootstrap has become one of the most popular front-end frameworks and open source projects in the world.


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