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The most popular HTML, CSS, and JavaScript framework for developing responsive, mobile first projects on the web.
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Latest commit 7ec09d0 @fat fat 2.0.1
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docs 2.0.1
img Changing the color of the default icons from black (#000) to grayDark (
js 2.0.1
less 2.0.1
.gitignore Merge branch '2.0-wip'
LICENSE dates updated to 2012
Makefile fix makefile to reset zips Merge branch '2.0.1-wip'


Bootstrap is Twitter's toolkit for kickstarting CSS for websites, apps, and more. It includes base CSS styles for typography, forms, buttons, tables, grids, navigation, alerts, and more.

To get started -- checkout!


For transparency and insight into our release cycle, and for striving to maintain backward compatibility, Bootstrap will be maintained under the Semantic Versioning guidelines as much as possible.

Releases will be numbered with the follow format:


And constructed with the following guidelines:

  • Breaking backward compatibility bumps the major
  • New additions without breaking backward compatibility bumps the minor
  • Bug fixes and misc changes bump the patch

For more information on SemVer, please visit

Bug tracker

Have a bug? Please create an issue here on GitHub!

Twitter account

Keep up to date on announcements and more by following Bootstrap on Twitter, @TwBootstrap.

Mailing list

Have a question? Ask on our mailing list!



Channel: ##twitter-bootstrap (the double ## is not a typo)


We have included a makefile with convenience methods for working with the Bootstrap library.

  • build - make Runs the LESS compiler to rebuild the /less files and compiles the docs pages. Requires lessc and uglify-js. Read more in our docs »

  • watch - make watch This is a convenience method for watching just Less files and automatically building them whenever you save. Requires the Watchr gem.


Mark Otto

Jacob Thornton

Copyright and license

Copyright 2012 Twitter, Inc.

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this work except in compliance with the License. You may obtain a copy of the License in the LICENSE file, or at:

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

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