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Validate sitemaps without enabling XXE
Broken sitemaps fail quietly: wrong root element, duplicate locs, missing loc, or an index nobody expands. Fetching a remote sitemap also needs SSRF controls and an XML parser that refuses DTDs.
Why this is worth doing in the browser
DevNestro’s Sitemap Validator parses with DtdProcessing prohibited and XmlResolver null. It reports Critical/Warning/Info findings for XML errors, root type, missing loc, duplicates, soft 50k URL / 50 MB guidelines, and nested sitemap index locs (listed, not auto-fetched). URL mode uses the safe public fetcher and is rate limited.
How to use the tool
Paste or upload XML, or enter a public sitemap URL, validate, fix Critical issues first, then re-check. Generator and Redirect Checker help when locs themselves redirect oddly.
- Nested index entries are not fetched automatically.
- URL mode is rate limited and SSRF-safe.
- Duplicate locs are warnings — clean them when possible.
- Never enable DTD resolution on untrusted XML.
Privacy
Paste/upload stay local; URL mode contacts only the public target through DevNestro’s safe fetcher.
Validate before submit — open Sitemap Validator and clear Critical findings first.