Duplicate html, head or body

Warning severity, in the Content tab

Why it matters

More than one <html>, <head> or <body> tag, usually from a template that nests a full page inside another. Parsers merge them unpredictably, so canonicals and meta tags can end up anywhere.

How to fix it

Emit exactly one <html>, one <head> and one <body>; check layout includes and error pages.

How Crawlune finds it

Crawlune flags Duplicate html, head or body automatically on every crawl and lists the affected URLs under the Content tab, where you can filter, inspect each page and export the list to CSV. The free version crawls up to 550 URLs with every check enabled.