What is an XML sitemap?
An XML sitemap is a file that lists the important URLs on your website so search engines can discover and crawl them more efficiently. It acts like a structured map of the pages you want bots to understand.
Some sitemaps also include helpful metadata such as when a page was last updated. Common sitemap filenames include sitemap.xml and sitemap_index.xml.
What does a sitemap checker or validator do?
A sitemap checker helps you test whether a sitemap is reachable, readable, and technically valid. It checks common sitemap locations, verifies accessibility, and helps spot issues that can interfere with crawling.
This kind of tool is especially useful when you want to confirm that the sitemap is not just present, but actually usable by search engines.
How do I validate an XML sitemap online?
Paste the domain into the tool and run the check. The validator will look for common sitemap locations, test whether the file is accessible, and check whether the XML structure appears valid.
That gives you a fast first-pass technical check before going deeper into Search Console or manual debugging.
Why is my sitemap not found?
Usually, that means the sitemap lives at a different URL than expected, the sitemap file is missing, the file is blocked or returning an error, or the domain redirects in a way that breaks the check.
Another clue can come from robots.txt, since some websites list their sitemap there. If the sitemap is not being detected, checking robots.txt is often worth doing next.
Why is my sitemap accessible but my pages still are not indexed?
Because a sitemap helps search engines discover pages, but it does not guarantee indexing. Pages can still fail to index if they are low quality, duplicated, canonicalized elsewhere, blocked by robots or meta rules, or weakly linked internally.
A valid sitemap is important, but it is only one piece of technical SEO, not a magic indexing switch.
Can this tool detect sub-sitemaps too?
Yes. If the website uses a sitemap index, the tool can detect the main index and check the child sitemaps as well.
That is useful for larger websites where separate sitemaps are split into posts, pages, products, categories, or other sections.
Where is a sitemap usually located?
Common sitemap URLs include /sitemap.xml, /sitemaps.xml, and /sitemap_index.xml. Some websites also reference the sitemap inside their robots.txt file.
If a sitemap checker does not find a sitemap immediately, those are the first places it usually looks.
What are common XML sitemap mistakes?
Common sitemap problems include broken URLs, inaccessible files, invalid XML formatting, wrong content types, outdated URLs, and including pages that are blocked or marked noindex.
Another common miss is forgetting to reference the sitemap in robots.txt. That is optional, but still helpful for crawler discovery.
Does this sitemap checker store the domains I check?
No. The tool runs the sitemap check and returns the result, but it does not store the domains you check or collect personal data through the checking process itself.
That keeps it simple, private, and practical for day-to-day technical SEO work.
Is this sitemap checker free to use?
Yes. This sitemap checker is free to use.
It is built as a zero-cost utility for website owners, developers, SEOs, and agencies who need a quick sitemap validation step without extra friction.