Free SEO Tools
Sitemap Lastmod Checker
Enter a sitemap or homepage URL to check its lastmod values for missing, malformed, or future dates.
About this tool
A lastmod date is a hint to crawlers, not a guarantee of re-crawling. This checks lastmod hygiene — missing, malformed, and future-dated entries — which most commonly indicate an automated sitemap generator misconfiguration.
Frequently Asked Questions
- What issues does this check for?
- Missing lastmod values, malformed dates, and future-dated entries.
- Does lastmod affect how often Google crawls a page?
- It's a hint to crawlers, not a guarantee of faster or more frequent crawling.
- What causes future-dated lastmod values?
- Most commonly a misconfigured or automated sitemap generator setting the wrong date.