Free SEO tools / Sitemap Checker
Enter a domain. The tool finds your sitemap from the Sitemap lines in robots.txt (or /sitemap.xml), reads sitemap index files (up to 5 child sitemaps), counts the URLs, checks the lastmod dates, duplicates, http:// and off-site URLs, and requests a sample of 15 URLs to catch 404s, redirects and noindex pages that should not be listed.
Free, no sign-up, no email needed.
Sources: Google: build and submit a sitemap
Per Google's documentation, a single sitemap can hold 50,000 URLs and be 50 MB uncompressed. Larger sites split into several sitemaps listed in a sitemap index.
It is optional. If you include it, it should be the date the page content last changed. The checker warns when it is missing for many URLs, malformed, or identical on every URL, because then it says nothing about which pages changed.
A sitemap is a list of the URLs you want crawled and indexed. Redirecting, erroring and noindex URLs in it waste crawl attention and signal that the list is not maintained.
Not by default: a sitemap can list URLs of the site that hosts it. The checker flags URLs on other hosts.
No. It helps crawlers discover URLs; whether they are indexed is decided separately.
The free audit runs an instant check of your domain across SEO and AI-search readiness, with a fix for each issue. No sign-up.
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