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---
layout: home
title: Bootstrap · The world's most popular mobile-first and responsive front-end framework.
---
<main class="bs-docs-masthead" id="content" role="main" tabindex="-1">
<div class="container">
<span class="bs-docs-booticon bs-docs-booticon-lg bs-docs-booticon-outline">B</span>
<p class="lead">Bootstrap is the most popular HTML, CSS, and JS framework for developing responsive, mobile first projects on the web.</p>
<p class="lead">
<a href="getting-started#download" class="btn btn-outline-inverse btn-lg" onclick="ga('send', 'event', 'Jumbotron actions', 'Download', 'Download {{ site.current_version }}');">Download Bootstrap</a>
</p>
<p class="version">Currently v{{ site.current_version }}</p>
{% include ads.html %}
</div>
</main>
<div class="bs-docs-featurette">
<div class="container">
<h2 class="bs-docs-featurette-title">Designed for everyone, everywhere.</h2>
<p class="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>
<hr class="half-rule">
<div class="row">
<div class="col-sm-4">
<img src="assets/img/sass-less.png" alt="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, <a href="../css/#less">Less</a> and <a href="../css/#sass">Sass</a>. Quickly get started with precompiled CSS or build on the source.</p>
</div>
<div class="col-sm-4">
<img src="assets/img/devices.png" alt="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>
<div class="col-sm-4">
<img src="assets/img/components.png" alt="Components" class="img-responsive">
<h3>Full of features</h3>
<p>With Bootstrap, you get extensive and beautiful documentation for common HTML elements, dozens of custom HTML and CSS components, and awesome jQuery plugins.</p>
</div>
</div>
<hr class="half-rule">
<p class="lead">Bootstrap is open source. It's hosted, developed, and maintained on GitHub.</p>
<a href="{{ site.repo }}" class="btn btn-outline btn-lg">View the GitHub project</a>
</div>
</div>
<div class="bs-docs-featurette">
<div class="container">
<h2 class="bs-docs-featurette-title">Built with Bootstrap.</h2>
<p class="lead">Millions of amazing sites across the web are being built with Bootstrap. Get started on your own with our growing <a href="../getting-started/#examples">collection of examples</a> or by exploring some of our favorites.</p>
<hr class="half-rule">
<div class="row bs-docs-featured-sites">
{% for showcase in site.data.showcase %}
<div class="col-xs-6 col-sm-3">
<a href="{{ showcase.expo_url }}" target="_blank" title="{{ showcase.name }}">
<img src="http://expo.getbootstrap.com/thumbs/{{ showcase.img }}-thumb.jpg" alt="{{ showcase.name }}" class="img-responsive">
</a>
</div>
{% endfor %}
</div>
<hr class="half-rule">
<p class="lead">We showcase dozens of inspiring projects built with Bootstrap on the Bootstrap Expo.</p>
<a href="{{ site.expo }}" class="btn btn-outline btn-lg">Explore the Expo</a>
</div>
</div>
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