Sitemap Validator - Validate sitemap.xml Online

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About Sitemap Validator

What is the Sitemap Validator?

Validate a <urlset> sitemap or <sitemapindex> sitemap index and get a clear list of errors and warnings.

What It Checks

Root type: urlset vs sitemapindex.
loc: missing or non-absolute URLs (optional enforcement).
lastmod: invalid ISO-8601 formats.
Size guidance: warnings for sitemaps over 50,000 URLs.

For sitemap discovery and generation, see Sitemap Finder & Checker, Sitemap Generator, and Sitemap Parser.

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