01 // SITEMAP VALIDATOR

XML validator.

Fast pre-flight on any sitemap. Protocol limits, structure, dates, duplicates — caught here before Google catches them in Search Console.

Frequently asked

FAQ

What does this validator actually check?

Well-formed XML — does it parse at all
50,000-URL protocol limit per sitemap file
50 MB uncompressed size limit
Duplicate URLs within the sitemap
Mix of http:// and https:// URLs
URLs on multiple hostnames (usually a mistake)
Malformed URL strings
<lastmod> in W3C / ISO 8601 date format
<priority> in 0.0–1.0 range
<changefreq> against the allowed enum

Is this stricter than Google's checker?

Google Search Console runs the same protocol-level checks plus its own reachability tests. This is a fast pre-flight — fix issues here before submitting in GSC.

Does it validate sitemap-index files?

Yes — it detects sitemap-index, validates each child reference, and surfaces issues per file.