What is Lighttpd? Lighttpd, or Lighty, as it is affectionately called, is an extensible, modular, low-footprint, single-threaded, high performance, web server that will happily run on small servers, and outperform an Apache server or Microsoft IIS in most settings. Lighttpd powers many large sites, such as the YouTube video download servers and the image upload server of Wikipedia. At the time of this writing, Lighttpd has the fifth place in the netcraft web server top ten. The plugin architecture encourages developing custom modules and trying new ideas. The development community around Lighttpd is friendly, helpful and pragmatic, and the documentation, though a little scattered, is quite thorough, if you know where to look.