HTML, CSS, and JS toolkit from Twitter
JavaScript Ruby
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Latest commit 8ff4a33 Feb 14, 2012 @petewarden petewarden Switched to checking for -webkit-transform-3d instead of plain -webki…
…t-transform since the latter is incorrectly shown as unsupported in Chrome 19.0.1036.7
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img Changing the color of the default icons from black (#000) to grayDark ( Jan 27, 2012
js fix alert tests + add show option back to modals Feb 6, 2012
less Switched to checking for -webkit-transform-3d instead of plain -webki… Feb 14, 2012
.gitignore Merge branch '2.0-wip' Jan 31, 2012
LICENSE dates updated to 2012 Jan 15, 2012
Makefile fix makefile to reset zips Feb 2, 2012 Fixed simple grammatical errors.… Feb 1, 2012


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!


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

  • build - make This will run the less compiler on the bootstrap lib and regenerate the docs dir. The lessc compiler is required for this command to run.

  • watch - make watch This is a convenience method for watching your less files and automatically building them whenever you save. Watchr is required for this command to run.


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.