Bootstrap,
from Twitter

Built for and by nerds

Like you, we love building awesome products on the web. We love it so much, we decided to help people just like us do it easier, better, and faster. Bootstrap is built for you.

For all skill levels

Bootstrap is designed to help people of all skill level—designer or developer, huge nerd or early beginner. Use it as a complete kit or use to start something more complex.

Cross-everything

Originally built with only modern browsers in mind, Bootstrap has evolved to include support for all major browsers (even IE7!) and, with Bootstrap 2, tablets and smartphones, too.

12-column grid

Grid systems aren't everything, but having a durable and flexible one at the core of your work can make development much simpler. Use our built-in grid classes or roll your own.

Responsive design

With Bootstrap 2, we've gone fully responsive. Our components are flexible enough to scale according to whatever resolution or device you're using to provide a consistent experience, no matter what.

Styleguide docs

Unlike other front-end toolkits, Bootstrap was designed first and foremost as a styleguide to document not only our features, but best practices and living, coded examples.

Growing library

Despite being only 7kb (gzipped), Bootstrap is one of the most complete front-end toolkits out there with dozens of fully functional components ready to be put to use.

Custom jQuery plugins

What good is an awesome design component without easy-to-use, proper, and extensible interactions? With Bootstrap, you get custom-built jQuery plugins to bring your projects to life.

Built on LESS

Where vanilla CSS falters, LESS excels. Variables, nesting, operations, and mixins in LESS makes coding CSS faster and more efficient with minimal overhead.

HTML5

Built to support new HTML5 elements and syntax.

CSS3

Progressively enhanced components for ultimate style.

Open-source

Built for and maintained by the community via GitHub.

Made at Twitter

Brought to you by experienced engineers and designers.