A sitemap is your explicit hint to the search engine about which URLs you consider important. This tool validates your sitemap.xml syntactically, that every URL actually responds (200 OK), that `lastmod` is fresh, and that hreflang alternates are wired correctly for bilingual sites.
XML Sitemap validator
Validate your XML sitemap: schema, URL reachability, lastmod, hreflang and priority.
Tool widget will live here. Use the main product in the meantime.