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HTML Version Statistics

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

  • The HTML 5 DOCTYPE is now the most common, used on over 50% of pages
  • XHTML 1.0 has dropped from 60% of pages in 2008, to around 30% of web pages today
  • HTML 4.01 has dropped from 20% of pages in 2008, to fewer than 5% of pages today
  • The total sample size is over 6 million pages, with around 250,000 new pages scanned a month

HTML Version Trends

Graph: HTML versions in use: HTML 5 accounts of 35% of pages, XHTML 1.0 accounts for around 40% of pages and HTML 4.01 for under 10%

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.

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