<!DOCTYPE html><htmllang=en><head><metacharset=utf-8><metahttp-equiv=X-UA-Compatiblecontent="IE=edge"><metaname=viewportcontent="width=device-width,initial-scale=1"><metaname=descriptioncontent="Bootstrap, a sleek, intuitive, and powerful mobile first front-end framework for faster and easier web development."><metaname=keywordscontent="HTML, CSS, JS, JavaScript, framework, bootstrap, front-end, frontend, web development"><metaname=authorcontent="Mark Otto, Jacob Thornton, and Bootstrap contributors"><title> Bootstrap · The world's most popular mobile-first and responsive front-end framework. </title><linkhref=../dist/css/bootstrap.min.cssrel=stylesheet><linkhref=../assets/css/docs.min.cssrel=stylesheet><!--[if lt IE 9]><script src="../assets/js/ie8-responsive-file-warning.js"></script><![endif]--><scriptsrc=../assets/js/ie-emulation-modes-warning.js></script><!--[if lt IE 9]><script src="https://oss.maxcdn.com/html5shiv/3.7.2/html5shiv.min.js"></script>
<scriptsrc="https://oss.maxcdn.com/respond/1.4.2/respond.min.js"></script><![endif]--><linkrel=apple-touch-iconhref=/apple-touch-icon.png><linkrel=iconhref=/favicon.ico><script>!function(e,t,a,n,c,o,s){e.GoogleAnalyticsObject=c,e[c]=e[c]||function(){(e[c].q=e[c].q||[]).push(arguments)},e[c].l=1*newDate,o=t.createElement(a),s=t.getElementsByTagName(a)[0],o.async=1,o.src=n,s.parentNode.insertBefore(o,s)}(window,document,"script","//www.google-analytics.com/analytics.js","ga"),ga("create","UA-146052-10","getbootstrap.com"),ga("send","pageview");</script></head><bodyclass=bs-docs-home><aid=skippyclass="sr-only sr-only-focusable"href=#content><divclass=container><spanclass=skiplink-text>Skip to main content</span></div></a><headerclass="navbar navbar-static-top bs-docs-nav"id=toprole=banner><divclass=container><divclass=navbar-header><buttonclass="navbar-toggle collapsed"type=buttondata-toggle=collapsedata-target=#bs-navbararia-controls=bs-navbararia-expanded=false><spanclass=sr-only>Toggle navigation</span><spanclass=icon-bar></span><spanclass=icon-bar></span><spanclass=icon-bar></span></button><ahref=../class=navbar-brand>Bootstrap</a></div><navid=bs-navbarclass="collapse navbar-collapse"><ulclass="nav navbar-nav"><li><ahref="../getting-started/">Getting started</a></li><li><ahref="../css/">CSS</a></li><li><ahref="../components/">Components</a></li><li><ahref="../javascript/">JavaScript</a></li><li><ahref="../customize/">Customize</a></li></ul><ulclass="nav navbar-nav navbar-right"><li><ahref=http://expo.getbootstrap.comonclick="ga("send","event","Navbar","Community links","Expo")">Expo</a></li><li><ahref=http://blog.getbootstrap.comonclick="ga("send","event","Navbar","Community links","Blog")">Blog</a></li></ul></nav></div></header><mainclass=bs-docs-mastheadid=contentrole=maintabindex=-1><divclass=container><spanclass="bs-docs-booticon bs-docs-booticon-lg bs-docs-booticon-outline">B</span><pclass=lead>Bootstrap is the most popular HTML, CSS, and JS framework for developing responsive, mobile first projects on the web.</p><pclass=lead><ahref=getting-started#downloadclass="btn btn-outline-inverse btn-lg"onclick="ga("send","event","Jumbotron actions","Download","Download 3.3.6")">Download Bootstrap</a></p><pclass=version>Currently v3.3.6</p><divid=carbonads-container><divclass=carbonad><divid=azcarbon></div><script>varz=document.createElement("script");z.async=!0,z.src="http://engine.carbonads.com/z/32341/azcarbon_2_1_0_HORIZ";vars=document.getElementsByTagName("script")[0];s.parentNode.insertBefore(z,s);</script></div></div></div></main><divclass=bs-docs-featurette><divclass=container><h2class=bs-docs-featurette-title>Designed for everyone, everywhere.</h2><pclass=lead>Bootstrap makes front-end web development faster and easier. It's made for folks of all skill levels, devices of all shapes, and projects of all sizes.</p><hrclass=half-rule><divclass=row><divclass=col-sm-4><imgsrc=assets/img/sass-less.pngalt="Sass and Less support"class=img-responsive><h3>Preprocessors</h3><p>Bootstrap ships with vanilla CSS, but its source code utilizes the two most popular CSS preprocessors, <ahref=../css/#less>Less</a> and <ahref=../css/#sass>Sass</a>. Quickly get started with precompiled CSS or build on the source.</p></div><divclass=col-sm-4><imgsrc=assets/img/devices.pngalt="Responsive across devices"class=img-responsive><h3>One framework, every device.</h3><p>Bootstrap easily and efficiently scales your websites and applications with a single code base, from phones to tablets to desktops with CSS media queries.</p></div><divclass=col-sm-4><imgsrc=assets/img/components.pngalt=Componentsclass=img-responsive><h3>Full of features</h3><p>With Bootstrap, you get extensive and beautiful documentation for common HTML elements, dozens of custom HTM
