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HTML Version Statistics

This page shows trends for HTML and XHTML versions for sites submitted to this service.

HTML Version Trends

Graph: HTML versions in use: XHTML 1.0 accounts for around 60% of pages, HTML 4.01 for around 16%

What is a DOCTYPE?

A Document Type Declaration, or DOCTYPE, is a piece of HTML code that says which version of HTML is being used. For example:
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN">

Note: Data is anonymized and aggregated to show averages. No site specific data is ever shown.