Sitemap Validator
100% PrivateSEO ToolsCheck pasted sitemap XML for broken structure, bad URLs and format errors.
Runs entirely in your browser. Your input is not uploaded to Ovatly or anywhere else.
Paste a sitemap to check it for errors and warnings.
- 1Paste the full sitemap.xml content into the box.
- 2Read the summary: file type, entry count, size and error count.
- 3Fix the errors first, then review the warnings.
- 4Re-paste the corrected file to confirm it is clean.
A sitemap whose first entry has <lastmod>31-01-2026</lastmod> fails with the error: "URL entry 1 has an invalid <lastmod> value \"31-01-2026\"." Sitemap dates must be in W3C format, year first: 2026-01-31. The same file with priority 1.5 would add a warning, because priority must stay between 0.0 and 1.0.
- The validator parses the XML with the browser's DOMParser and checks urlset and sitemapindex files, including namespaced variants produced by common CMS plugins.
- Protocol limits checked are the documented ones: 50,000 URLs per file and 50 MB uncompressed.
- A clean validation means the file is well-formed and consistent; it cannot tell you whether the listed pages themselves are indexable or worth crawling.
Errors break the format or the protocol (malformed XML, missing loc, invalid dates, oversized files) and can make engines ignore entries or the whole file. Warnings are problems like duplicates or out-of-range priorities that engines usually tolerate but you should still fix.
About this tool
The Sitemap Validator checks pasted sitemap XML for the problems that make search engines reject or ignore a file: malformed XML, missing or invalid URLs, bad lastmod dates, duplicates and protocol limit breaches. It reports errors and warnings separately so you can fix what actually blocks parsing first.
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