HTML vs XHTML version statistics

Posted by Mark Rogers on Oct 8, 2016 | 

Web Standards

As part of the online demo at we collect summary statistics about pages scanned by our service. One interesting statistic covers versions of HTML and XHTML in common use. As of September 2016:

HTML Version by Doctype: HTML 5 75%; XHTML 1.0 11%; XHTML 1.1 0%; HTML 4.01 3%

HTML vs. XHTML Version Statistics

This is based on a sample size of over 10 million pages on 1 million web sites.

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


First posted Feb 2011, updated Oct 2016