The World Wide Web Consortium (W3C) is the main international standards organization for the World Wide Web (abbreviated WWW or W3). It is arranged as a consortium where member organizations maintain full-time staff for the purpose of working together in the development of standards for the World Wide Web. As of February 2008, the W3C had over 400 members.

W3C also engages in education and outreach, develops software and serves as an open forum for discussion about the Web. It was founded by Sir Tim Berners-Lee.