This page shows trends for web standards compliance across sites submitted to the online demo.
Valid HTML / XHTML Pages
Percentage of pages that validate against DOCTYPE.
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> <!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.