Sitemap Validator: Check sitemap.xml Structure

Sitemaps help search engines discover your pages. If your sitemap is malformed or missing URLs, you can lose indexing coverage. A sitemap validator checks structure and quickly lists the URLs inside the file.

This guide explains what a sitemap should contain and how to validate it.

What a sitemap should include

• A valid XML structure
• <url> entries with <loc> values
• Optional <lastmod> tags for freshness

Fast workflow

1. Enter your sitemap URL.
2. Fetch and parse the XML.
3. Review the count and sample URLs.
4. Fix issues in your generator if needed.

Common sitemap problems

• Invalid XML markup
• Missing or empty <loc> values
• Stale or incorrect <lastmod> timestamps

Best practices

• Keep sitemaps under the max URL limit and split when needed.
• Update lastmod timestamps when pages change.
• Ensure the sitemap is referenced in robots.txt.

Checklist

• XML is valid
• All expected URLs are present
• Last modified dates are accurate
• Sitemap is listed in robots.txt

FAQ

Can this check large sitemaps? Yes, but very large files may take longer in the browser.

Why do I see a CORS error? Some sites block browser requests. You can still validate manually.

Do I need a sitemap index? If you have many URLs, a sitemap index is recommended.

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