Paste a sitemap XML to validate structure, URL count and lastmod format.
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The Sitemap Validator checks an XML sitemap for the problems that stop search engines from using it: malformed XML, invalid or blocked URLs, missing lastmod values, oversized files, and entries that do not match the site's structure. It is for webmasters, developers, and SEO teams who want sitemaps to be a reliable discovery signal. Fix what it reports, then resubmit the sitemap in your search console.
Well-formed XML in the sitemaps.org namespace, absolute URLs, under 50,000 entries and 50 MB per file, and only canonical, indexable pages. Optional lastmod values should be accurate, because search engines may ignore dates they consider unreliable.
A sitemap is a discovery hint, not a guarantee. Pages may be excluded for quality, duplication, noindex directives, robots.txt blocks, or weak internal linking. Fix those causes rather than resubmitting the same URLs.
Include canonical pages you want indexed and omit redirects, error pages, duplicates, and anything blocked by robots.txt. Large sites should split sitemaps by type and reference them from a sitemap index.
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