Sitemap.xml Validator
Fetch any XML sitemap and check it against the sitemaps.org protocol: root element, namespace, entry and size limits, and every URL location.
What is an XML sitemap?
An XML sitemap is a file (usually at /sitemap.xml) that lists the pages on your site so search engines can discover and crawl them. It follows the sitemaps.org protocol: a <urlset> of up to 50,000 <url> entries (or a <sitemapindex> pointing at several sitemaps), each no larger than 50 MB uncompressed. Every entry needs an absolute <loc> URL and may add optional <lastmod>, <changefreq> and <priority> hints. This validator checks all of that and reports anything that would trip up a crawler.