Check a sitemap before submitting it
An XML sitemap provides a structured list of URLs or references to other sitemap files. It helps a crawler discover content, especially when a site is large or recently reorganized, but it does not guarantee that every listed page will be crawled or indexed. A useful sitemap contains the intended canonical destinations and reflects the current publishing structure rather than every URL that has ever existed.
This validator checks XML you paste or load from a local file. It recognizes the standard urlset and sitemapindex roots and examines common structural problems. The report can identify invalid XML, missing locations, duplicate entries, malformed absolute URLs, and certain date or value errors. It does not fetch the listed pages, request nested sitemap files, or confirm that the URLs are accessible on the public website. Those are separate live-site checks.
Understand roots, namespaces, and URL entries
A standard page sitemap uses a urlset root and one url element for each listed location. A sitemap index instead uses sitemapindex and references other sitemap files. The standard namespace identifies the vocabulary so a parser can distinguish these elements from unrelated XML. A file can look visually similar while using a misspelled root or missing namespace, which is why structural checks are useful before submission.
Each entry needs one absolute HTTP or HTTPS location. A relative path is not sufficient for this format. Ampersands in URLs must be escaped correctly in XML, even though the underlying web address may contain ordinary query separators. Duplicating the same location adds noise without making the page more important. Fragments usually identify a position within a page rather than a separately fetchable document, so a fragment in a location deserves review rather than being treated as an ordinary new page.
Use dates and optional hints honestly
The lastmod value should describe a meaningful modification to the page or sitemap, not merely the time an unrelated build ran. Rewriting every date on every deployment can make the information less useful. Use a valid date or supported timestamp and keep the value consistent with the actual content change. A date that looks plausible but refers to an impossible calendar day should be corrected before publication.
Optional priority and changefreq values are hints within the sitemap format, not instructions that force a ranking or crawling schedule. A high priority value does not make a page outrank competitors. If those fields are present, use the allowed values and do not spend more effort tuning them than maintaining accurate URLs. Sitemap extensions for images, video, or alternate languages have their own requirements; this local checker does not claim to validate every extension schema or every search engine's interpretation.
Follow structural validation with deployment checks
Imagine a sitemap produced after a site migration. Its XML might be perfectly formed while every URL still points to the old hostname or a redirecting path. The local report can flag multiple hosts and obvious syntax issues, but it cannot establish the intended canonical host or ownership permissions. Compare the generated locations with the site's actual publishing rules before submitting the file.
Once deployed, check that the sitemap is publicly accessible with the expected content type and that important listed pages return the intended status. Review indexability and canonical tags separately. This browser implementation accepts a smaller working file than the maximum allowed by the sitemap protocol so that it remains manageable on ordinary devices. Split large sites into sitemap files and an index as appropriate, then validate individual files. Keep a sample of the source and report when fixing a generator so the correction can be tested again after a template or build change.
Separate local checks from live search behavior
A browser-based SEO check is most useful when its scope is clear. The tool works with the content you supply; it does not establish what a search engine last crawled, indexed, or chose to display. After updating a website, inspect the deployed source and use the relevant search-console reports to confirm that the live page matches your intention. Caches, redirects, rendering, and publishing systems can all make production behavior differ from a saved example.
Keep test material representative of the page you intend to publish. Replace private URLs and credentials with safe examples when preparing a public report, and do not assume that syntactically correct markup makes a page useful or trustworthy. Search visibility also depends on accessible content, crawlable links, appropriate indexing directives, and the quality of the actual information offered to visitors.
Results are processed locally in the browser by this tool. Supplied URLs are not automatically fetched, and remote structured-data contexts are not downloaded for verification. That keeps the check predictable but limits what it can prove. Save the report alongside the original input when handing an issue to a developer. Describe the observed mismatch precisely rather than reporting that a page is simply good or bad for SEO. No local preview or validator can promise rankings, indexing, or enhanced search appearance.
When making a change, keep the previous version and a short reason for the update. Recheck the exact page or file after deployment instead of assuming a local edit reached production. If several systems generate the same metadata, identify the owning template before patching individual pages. Consistent maintenance is more useful than repeatedly fixing the visible symptom while an automated build continues to recreate the original problem.
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Frequently asked questions
Does a passed report guarantee indexing?
No. Structural validity only means the supplied file passed the checks performed here. Search engines also consider accessibility, indexing directives, canonicalization, content quality, and other signals. A sitemap is a discovery aid, not a guarantee of search inclusion.
Does the validator check HTTP status codes?
No URLs are fetched by this tool. Check live responses, redirects, canonical tags, and indexing rules with a suitable site-audit or search-console workflow. A valid-looking location can still lead to an error or an unintended destination.
Can I validate a sitemap index?
Yes. The tool checks the supplied index structure and its location entries, but it does not download the referenced sitemap files. Validate those files separately and confirm their live availability after deployment.
Related tools
Reference and further reading
The XML sitemap protocol provides background on the relevant format, technology, or requirements. External services have their own policies and may change independently of this page.