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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.

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

HTML5 Part 1 course on W3Cx!

Learn HTML5 and core Web technologies directly from the organization creating them! Learn to code Web pages and Web sites the right way. HTML 5 Part 1 is an intermediate level course requiring basic HTML5 and CSS knowledge.

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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.