<p>If you work with Bootstrap's uncompiled source code, you need to compile the .LESS files to produce usable CSS files. For compiling LESS files into CSS, we only officially support <ahref="http://twitter.github.io/recess/">Recess</a>, which is Twitter's CSS hinter based on <ahref="http://lesscss.org">less.js</a>.</p>
<p>If you work with Bootstrap's uncompiled source code, you need to compile the .LESS files to produce usable CSS files. For compiling LESS files into CSS, we only officially support <ahref="http://twitter.github.io/recess/">Recess</a>, which is Twitter's CSS hinter based on <ahref="http://lesscss.org">less.js</a>.</p>