To validate an XML sitemap, enter its address into the free XML Sitemap Validator above. It checks the format and URL count, then samples some of the listed URLs for errors and noindex conflicts. You learn quickly whether the file is readable and whether it is pointing search engines at pages that should not be there.
Google asks for fully-qualified, absolute URLs in your sitemaps, and sets a limit of 50,000 URLs or 50MB uncompressed per file, which are the first things worth checking in any sitemap.
How to use the XML Sitemap Validator
- Enter the full address of your sitemap, for example the
sitemap.xmlat your domain root. - Run the check and wait while the server fetches the file.
- Read the format result first, then the URL count.
- Review the sampled URLs for errors and noindex conflicts, and fix what is flagged.
- Fix the source of the problem, republish the sitemap and validate it again.
How to read the results
The tool reports on three things: the file itself, how many URLs it holds, and what happens when a sample of those URLs is requested.
- Format. A pass means the XML could be read as a sitemap. A failure usually points to broken markup, a wrong file type, or an HTML page returned in place of XML.
- URL count. Compare it with how many pages you expect. A count far lower than expected suggests missing pages. A count near 50,000 means you should plan to split the file.
- Errors in the sample. URLs that return a 404 or a server error do not belong in a sitemap.
- Noindex conflicts. A URL listed in the sitemap but marked noindex sends mixed signals. The sitemap says index this, the page says do not.
A good result is a readable file, a plausible count, and a clean sample where every page loads normally and is meant to be indexed.
Common problems this finds
- Redirecting URLs. List the final destination, not the old address. Use the Redirect and Status Code Checker to find where each one ends.
- Deleted pages still listed. Remove them from the sitemap, or restore the pages if the removal was a mistake.
- Noindex pages listed. Either remove the page from the sitemap or remove the noindex, depending on what you actually want.
- Relative or wrong-host URLs. Use full absolute addresses on the correct protocol and host.
- HTML instead of XML. Some setups return a login page or an error page at the sitemap address. Fix the path or the server rule.
Why a clean sitemap matters
A sitemap is a list of pages you are telling search engines are worth crawling. If the list is full of errors, redirects and blocked pages, you waste crawler attention and make the file less trustworthy as a guide. A tidy sitemap also gives you a useful check on your whole site: when the sitemap and the pages you can actually find do not match, something is usually wrong with templates, plugins or redirects.
A worked example
This is an illustrative example. You validate a sitemap and the format passes, with a URL count of 420 against roughly 400 pages you expected. The sample, however, flags two URLs that return a 404 and one that is marked noindex. The 404 pages were deleted last month but the plugin kept them in the file. The noindex page is a thank-you page that was never meant to rank. You exclude all three in your sitemap settings, republish, and validate again. The second run shows a clean sample, and the count drops to match your expectation.
Run this check after site migrations, theme changes and plugin updates, since those are the moments when sitemaps most often go wrong.
Limits of the validator
The tool fetches the sitemap from this site’s server and checks a sample of the URLs, not every one, so a clean sample does not prove every page is fine. It sees what the server returns to an automated request, and some sites block such requests. There is a fair-use limit on repeated checks. It is not a substitute for the coverage data in Google Search Console, which shows what Google itself found. If you need a file to start from, use the XML Sitemap Generator.
Questions about the XML Sitemap Validator
How many URLs can one sitemap contain?
Google states a single sitemap is limited to 50,000 URLs or 50MB uncompressed. If you pass either limit, split the list into several sitemaps and use a sitemap index file to point to them.
Why would a noindex page be in my sitemap?
Usually a plugin or template adds pages automatically without checking their robots settings. Decide whether the page should rank. If yes, remove the noindex. If no, take it out of the sitemap.
Does a valid sitemap guarantee indexing?
No. A valid file only helps search engines discover your URLs. Whether they are crawled and indexed depends on quality, duplication, links and other signals.
Back to all free technical SEO tools or the full toolkit. If you would rather have someone check the whole site, see my technical SEO services or ask for a free audit.