Sitemap Validator
Validate any XML sitemap — check URL count, format, lastmod dates, and common issues. 100% free.
Why Sitemap Validator Matters
Your XML sitemap is how Google discovers new and updated pages. A malformed sitemap, missing lastmod dates, or URLs that return errors silently slow down indexation — keeping your content out of search results for days or weeks longer than necessary.
Indexation Speed
A valid, up-to-date sitemap with accurate lastmod dates helps Google prioritise crawling your newest content first.
Format Compliance
Check that your sitemap meets the XML sitemap protocol — proper tags, valid URLs, and correct encoding — to avoid silent errors.
- Sitemaps with non-canonical URLs confuse crawlers and dilute crawl budget.
- Missing image sitemaps can leave product and blog images out of Google Image search.
- Submit your validated sitemap URL directly in Google Search Console for fastest indexation.
How to use Sitemap Validator
Enter Your Sitemap URL
Paste your full sitemap URL — typically yourdomain.com/sitemap.xml or linked from robots.txt.
Check URL Count & Structure
See how many URLs are listed, how many include lastmod dates, and whether it's a sitemap index.
Review Issues
The validator flags missing tags, URLs over limit, and structural problems that could slow crawling.
Fix & Resubmit
After fixing flagged issues, resubmit the sitemap in Google Search Console to trigger a fresh crawl.
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Sitemap Health Monitoring Workflow
Validate your sitemap after every major content push to ensure new pages are correctly listed and Google can discover them without delay.
Recommended implementation sequence
SEO Workflow Map
Validate Your Sitemap
Run this tool after publishing new pages or making structural site changes.
Check Lastmod Coverage
Ensure newly published pages have accurate lastmod timestamps — not missing or static.
Review Sample URLs
Spot-check 5-10 listed URLs to confirm they return 200 status and aren't noindex pages.
Resubmit in Search Console
After validation, ping Google Search Console to prompt a recrawl of the updated sitemap.
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Frequently Asked Questions
Everything you need to know about sitemap validator.
An XML sitemap is a file listing all important URLs on your website, helping search engines discover and index your content faster. It can also include metadata like last-modified dates.
A single sitemap can contain a maximum of 50,000 URLs and must be under 50 MB uncompressed. For larger sites, use a sitemap index file that references multiple sitemaps.
Update your sitemap whenever you add, remove, or significantly update pages. Most CMS platforms do this automatically. Ping Google Search Console after major updates.
A sitemap index is an XML file that references multiple child sitemaps instead of listing URLs directly. It's used for sites with over 50,000 pages or when separating content types like blog posts, products, and landing pages.
Lastmod dates tell crawlers which pages have changed recently, helping them prioritise recrawling. Pages without lastmod dates may be recrawled less frequently, slowing indexation of updated content.
Fonzy automatically updates your sitemap whenever new resource pages are generated, ensuring all programmatically created pages are discoverable by search engines immediately.