File structure
01Recognize sitemap indexes and URL sets.
Free XML sitemap validator.
Check sitemap structure, nested files, URL quality, duplicates, and modification dates from one domain or file URL.
Structure
Check sitemap indexes, URL sets, and XML namespaces.
URLs
Find invalid, duplicate, and cross-domain locations.
Dates
Catch malformed lastmod values across nested files.
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What gets checked
Sitemap evidence, clearly separated.
Nested files
02Follow same-site child sitemaps with a strict cap.
URL quality
03Find invalid, duplicate, and cross-domain locations.
Modification dates
04Flag malformed lastmod values.
XML sitemap validator FAQ
Validation without mystery scores.
What does an XML sitemap validator check?
It checks whether sitemap files can be fetched and parsed, whether they use a sitemap index or URL set structure, and whether entries contain valid URLs and dates.
Can this validate a sitemap index?
Yes. The validator follows same-site child sitemap files and checks up to eight files in one run.
How many URLs can a sitemap contain?
The sitemap protocol allows up to 50,000 URLs or 50 MB uncompressed per file. Larger sites should split URLs across files and reference them from a sitemap index.
Does a valid sitemap guarantee indexing?
No. A sitemap helps search engines discover canonical URLs, but response status, robots directives, page quality, and other indexing signals still matter.