Free XML Sitemap Validator — Structure & URL Check
XML Sitemap Validator
Validating a sitemap means checking it against the sitemaps.org protocol: well-formed XML, a correct urlset or sitemapindex namespace, absolute URLs on the same host, W3C-format lastmod dates, and no more than 50,000 URLs or 50MB uncompressed per file. A sitemap that fails any of these is rejected wholesale, not partially — one malformed entry can cost you the entire file.
Paste your sitemap.xml to validate structure, URL count, lastmod dates, and sitemaps.org compliance. Free, client-side, no signup.
Free XML Sitemap Validator — Structure & URL Check is part of LemRank, the rank intelligence platform for SEO agencies and in-house teams: daily rank tracking, SERP change detection, AI Overview and LLM visibility, competitor gap analysis, site audits and white-label client reporting.