Your sitemap tells search engines which pages on your site to crawl – and a broken or poorly structured sitemap can slow down indexing, cause pages to be missed entirely, or prevent Googlebot from discovering new content. Our Sitemap Validator fetches and analyses any publicly accessible XML sitemap in seconds, checking it against the official sitemaps.org protocol and common best practices. Get a clear pass/warning/fail status, a full list of issues, and a paginated table of every URL in the sitemap.
Sitemap Validator
Validate any XML sitemap by entering its URL below. Checks structure, required fields, duplicate URLs, invalid values, and supports sitemap index files.
Enter the full URL of the sitemap, e.g. https://example.com/sitemap.xml or https://example.com/sitemap_index.xml. The sitemap must be publicly accessible.
Enter your sitemap URL and click Validate Sitemap to begin.
Why Choose Our Sitemap Validator?
- Validates both standard urlset sitemaps and sitemap index files, with automatic detection of the type.
- Checks for well-formed XML – if your sitemap has a parse error, the tool tells you exactly which line the problem is on.
- Detects the most common sitemap errors: missing <loc> elements, invalid URLs, duplicate entries, missing namespace declarations, and sitemaps exceeding the 50,000 URL limit.
- Flags warnings for optional but recommended fields: invalid <lastmod> date formats, unrecognised <changefreq> values, and <priority> values outside the 0.0–1.0 range.
- Summary dashboard shows total URL count, error count, warning count, sitemap type, and an overall pass/warning/fail badge at a glance.
- Paginated URL table displays up to 50 entries per page with per-row status badges, making it easy to spot which specific URLs have issues.
- Live URL filter lets you search within the sitemap results to quickly find a specific page or domain path.
- Completely free. No account or login required.
Our Sitemap Validator is perfect for:
- SEO professionals auditing a site’s sitemap as part of a technical SEO review, before a migration, or after a redesign.
- Web developers who want to verify that a programmatically generated sitemap is correctly formatted before submitting it to Google Search Console.
- Site owners who have noticed indexing problems and want to rule out sitemap errors as a cause.
- Agencies managing multiple client websites who need a quick way to check sitemap health across different domains.
- Anyone who has recently changed their CMS, permalink structure, or URL format and wants to confirm the sitemap reflects the new structure correctly.
How to Use Our Sitemap Validator:
- Find your sitemap URL – it is typically at yoursite.com/sitemap.xml or yoursite.com/sitemap_index.xml. You can also check robots.txt for a Sitemap: directive.
- Enter the full sitemap URL (including https://) in the field above.
- Click “Validate Sitemap” - the tool will fetch and parse the XML server-side.
- Review the summary dashboard: check total URL count, error count, warning count, and the overall pass/warning/fail status.
- Read through the Issues Found section for any structural or global problems.
- Browse the URL table to see per-entry status badges. Red rows have errors; yellow rows have warnings.
- Use the filter box to search for specific URLs within the results.
If any errors are shown, fix them in your CMS or sitemap plugin and re-validate. A clean, error-free sitemap helps search engines crawl and index your site more efficiently, which can accelerate the discovery of new and updated content.
Frequently Asked Questions
What is an XML sitemap and why does it matter for SEO?
An XML sitemap is a file that lists the URLs on your website and provides metadata about each one – such as when it was last updated, how often it changes, and its priority relative to other pages. Search engines like Google use sitemaps as a crawl guide, particularly for large sites or pages that are not easily discoverable through internal links. A well-maintained sitemap helps ensure that all your important pages get crawled and indexed. A sitemap with errors, on the other hand, can cause pages to be skipped or cause Googlebot to waste crawl budget on pages that shouldn’t be indexed.
How many URLs can a sitemap contain?
According to the official sitemaps.org protocol, a single sitemap file must not exceed 50,000 URLs or 50 MB in uncompressed size. If your site has more than 50,000 pages, you need to split them across multiple sitemap files and reference each one from a sitemap index file. Our validator detects when a sitemap exceeds the 50,000 URL limit and flags it as an error.
What does “invalid lastmod date format” mean?
The <lastmod> element should use the W3C Datetime format, which is a subset of ISO 8601. The most common formats are YYYY-MM-DD (e.g. 2024-06-15) or full date-time with timezone (e.g. 2024-06-15T09:30:00+00:00). Formats like “June 15, 2024” or “15/06/2024” are not valid and will be flagged as warnings. While Google says it ignores lastmod values it considers unreliable, using the correct format is still best practice.
What is a sitemap index file?
A sitemap index file is an XML file that lists multiple individual sitemap files rather than listing URLs directly. It uses a <sitemapindex> root element and <sitemap> child elements, each containing a <loc> pointing to a child sitemap and an optional <lastmod>. This is the recommended approach for large sites with more URLs than fit in a single sitemap. Our validator automatically detects whether you’ve entered a sitemap index or a regular urlset sitemap.
Should I submit my sitemap to Google Search Console?
Yes. Submitting your sitemap through Google Search Console (under Indexing → Sitemaps) allows Google to track which URLs have been discovered, indexed, or encountered errors. It also gives you visibility into how Google reads your sitemap. However, you should always validate your sitemap first - submitting one with errors can delay indexing and generate error reports in Search Console that require time to diagnose.
