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to help you learn, build, and move the web forward.



In the comfort of your browser, learn Web technologies such as HTML, CSS from the people who create them.


Lead your code to its full potential with great and open source tools.

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Get involved in the creation of Web standards. Yes, that's where cool people hang out.

Test the Web Forward

W3C's one stop shop for Open Web Platform testing.

Learn CSS with our new W3Cx MOOC course

Thinking about becoming a Web designer? With the 20th anniversary of CSS coming up, there’s no better time to get the hows and whys of CSS. Whether you’re just starting out or you’re self-taught and want to do it the “right” way, enroll the CSS Introduction course — which includes a cameo from Bert Bos, the co-creator of CSS — with the experts at the W3C and Microsoft, to start 7 November 2016

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Introducing W3C Friends

We are making it easy for you to join as Friends, take advantage of our offerings, and donate to support us in conducting the activities that fulfill the W3C's mission.