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HTML vs XHTML version statistics

Posted by Mark Rogers on Mar 20, 2019 | 

Web Standards

As part of the online demo at try.powermapper.com we collect summary statistics about pages scanned by our service. One interesting statistic covers versions of HTML and XHTML in common use. As of March 2019:

HTML Version by Doctype: HTML 5 93%; XHTML 1.0 5%; XHTML 1.1 0%; HTML 4.01 1%

HTML vs. XHTML Version Statistics

This is based on a sample size of over 20 million pages on 2 million web sites.

Note: the graph in this post is live, so may show newer data than the date of this post.


First posted Feb 2011, updated Mar 2019