Free Sitemap XML Validator
Check your XML sitemap or sitemap index for the errors that break crawling — missing loc tags, relative URLs, duplicates, bad lastmod, and the 50,000-URL limit.
Paste your sitemap or fetch it by URL to validate.
Frequently asked questions
What does the sitemap validator check?+
It confirms the file is a valid XML sitemap (<urlset>) or sitemap index (<sitemapindex>), counts URLs, and flags the issues that hurt crawling: missing <loc>, relative URLs, duplicates, the 50,000-URL limit, a missing namespace, and invalid <lastmod>, <changefreq>, or <priority> values.
Can I validate a live sitemap by URL?+
Yes. Switch to "Fetch by URL", enter your sitemap URL (for example https://yourdomain.com/sitemap.xml), and the tool retrieves and validates it. You can also paste the XML directly.
What is the URL limit for a sitemap?+
A single sitemap file can contain at most 50,000 URLs and must be under 50 MB uncompressed. If you exceed that, split into multiple sitemaps and list them in a sitemap index file.
Do AI crawlers use sitemaps?+
Yes. A clean sitemap helps every crawler — including AI answer engines — discover all of your pages efficiently. Pair it with a Sitemap directive in robots.txt so bots find it.
Is it free and private?+
Yes — free, no signup, and validation runs in your browser. Only the "Fetch by URL" mode retrieves the remote file, and nothing is stored.