CSS toolkit from Twitter converted to Sass. There are other ports of the bootstrap to Sass. This project is focused on being a 1:1 translation from Less to Sass.
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Sass Bootstrap v3.0.0 Build Status

Bootstrap is a sleek, intuitive, and powerful front-end framework for faster and easier web development, created and maintained by Mark Otto and Jacob Thornton.

This is the Sass version of Bootstrap. A port of Bootstrap from Less to Sass. This project is focused on being a 1:1 port of the original. Please do not submit issues or pull requests for issues with Bootstrap itself. Those should be pushed upstream in the Less version.

To get started, check out http://getbootstrap.com!

Quick start

Three quick start options are available:


You can use the Sass Bootstrap by dropping the compiled CSS into any new project and start cranking.

Because SASS always outputs standard css, just link to the final output like normal:

<link rel="stylesheet" type="text/css" href="./dist/css/bootstrap.css">

For more info, refer to the docs!

Basic modification

You can learn more about Sass at:


Sass runs as a local GEM on your system. You can run sass --watch lib/bootstrap.scss:dist/css/bootstrap.css

Bugs and feature requests

Please do not submit issues or pull requests for issues with Bootstrap itself. Those should be pushed upstream in the Less version. Please open a new issue. Before opening any issue, please search for existing issues and read the Issue Guidelines, written by Nicolas Gallagher.

You may use this JS Bin as a template for your bug reports.


Bootstrap's documentation, included in this repo in the root directory, is built with Jekyll and publicly hosted on GitHub Pages at http://getbootstrap.com. The docs may also be run locally.

Running documentation locally

  1. If necessary, install Jekyll (requires v1.x).
  2. From the root /bootstrap directory, run jekyll serve in the command line.
  • Windows users: run chcp 65001 first to change the command prompt's character encoding (code page) to UTF-8 so Jekyll runs without errors.
  1. Open http://localhost:9001 in your browser, and voilà.

Learn more about using Jekyll by reading their documentation.

Documentation for previous releases

Documentation for v2.3.2 has been made available for the time being at http://getbootstrap.com/2.3.2/ while folks transition to Bootstrap 3.

Previous releases and their documentation are also available for download.

Compiling CSS and JavaScript

Bootstrap uses Grunt with convenient methods for working with the framework. It's how we compile our code, run tests, and more. To use it, install the required dependencies as directed and then run some Grunt commands.

Install Grunt

From the command line:

  1. Install grunt-cli globally with npm install -g grunt-cli.
  2. Install the necessary local dependencies via npm install

When completed, you'll be able to run the various Grunt commands provided from the command line.

Unfamiliar with npm? Don't have node installed? That's a-okay. npm stands for node packaged modules and is a way to manage development dependencies through node.js. Download and install node.js before proceeding.

Available Grunt commands

Build - grunt

Run grunt to run tests locally and compile the CSS and JavaScript into /dist. Requires recess and uglify-js.

Only compile CSS and JavaScript - grunt dist

grunt dist creates the /dist directory with compiled files. Requires recess and uglify-js.

Tests - grunt test

Runs jshint and qunit tests headlessly in phantomjs (used for CI). Requires phantomjs.

Watch - grunt watch

This is a convenience method for watching just Less files and automatically building them whenever you save.

Troubleshooting dependencies

Should you encounter problems with installing dependencies or running Grunt commands, uninstall all previous dependency versions (global and local). Then, rerun npm install.


Please read through our guidelines for contributing to Bootstrap. Included are directions for opening issues, coding standards, and notes on development.

More over, if your pull request contains JavaScript patches or features, you must include relevant unit tests. All HTML and CSS should conform to the Code Guide, maintained by Mark Otto.

Editor preferences are available in the editor config for easy use in common text editors. Read more and download plugins at http://editorconfig.org.


Keep track of development and community news.


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 following format:


And constructed with the following guidelines:

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

For more information on SemVer, please visit http://semver.org/.

SASS: Developers

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

  • build - rake build 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 - rake watch This is a convenience method for watching your Sass files and automatically building them whenever you save.


Mark Otto

Jacob Thornton

SASS: Conversion less to Sass

The Twitter Bootstrap was lovingly converted to Sass by:

John W. Long

Jeremy Hinegardner



And others

SASS: Conversion Quick Tips

  • replace @ with $
  • replace . with @include for mixins
  • replace spin with adjust-hue
  • add !default to variable definitions
  • replace #gradient > .vertical with @include gradient-vertical
  • replace #grid > .style with @include grid-style
  • use grid-core and grid-fluid mixins instead of #grid > .core and #grid > .fluid
  • use font-shorthand instead of #font > .shorthand
  • replace fadein with fade-in
  • move @import for reset below mixins, because it uses tab-focus mixin in bootstrap.scss
  • explicitly provide .clearfix, .hide-text and .input-block-level for compatibility with LESS output
  • pass grid-* mixin arguments to generators, because otherwise the generator mixins will use the default variables pull transition definition into variable

Sass: Installation via Composer

If you already use Composer, the php dependency manager, installing sass-twitter-bootstrap is as simple as typing :

composer.phar require jlong/sass-bootstrap:x.y.z

This will install version x.y.z from packagist.org

You'll probably want to make sure you get minor updates, like this:

composer.phar require jlong/sass-bootstrap:~x.y.z

or like this:

composer.phar require jlong/sass-bootstrap:x.y.*

Copyright and license

Copyright 2012 Twitter, Inc under the Apache 2.0 license.