A sitemap.xml validator checks whether your XML sitemap conforms to the sitemaps.org protocol specification that search engines like Google, Bing, and Yandex rely on to discover and crawl your website pages. An XML sitemap is essentially a roadmap of your website that lists every URL you want search engines to index, along with optional metadata like last modification date, change frequency, and priority. A malformed sitemap -- with invalid XML syntax, wrong namespaces, duplicate URLs, or exceeding the 50,000 URL / 50MB size limits -- can prevent search engines from discovering your content entirely. Common issues include missing the required xmlns namespace declaration, using http:// instead of https:// URLs, including duplicate entries that waste crawl budget, and exceeding Google's size limits. This validator parses your sitemap XML using a standards-compliant parser, checks the root element type (urlset or sitemapindex), validates every URL, and reports errors, warnings, and statistics in a clear, categorized format.
Copy the full contents of your sitemap.xml file and paste it into the editor. The tool handles both regular <urlset> sitemaps and <sitemapindex> files that reference multiple sub-sitemaps.
The validator instantly parses the XML and reports errors (invalid XML, missing loc tags, exceeded limits), warnings (http:// URLs, duplicates, wrong namespace), and info (total URL count, file size).
Edit your sitemap XML directly in the editor or fix it in your CMS/generator, then re-paste to verify. Once the status shows Valid with no errors, your sitemap is ready to submit to Google Search Console.
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