Sitemap Validator
Validate an XML sitemap and check its URLs.
- 100% free
- Private in browser
- No signup
- No watermarks
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About Sitemap Validator
A broken sitemap can quietly stop search engines from finding your pages. Sitemap Validator on TheToolss checks a pasted XML sitemap or sitemap index for the essentials: a valid root element and namespace, URLs that are absolute and properly escaped, W3C-formatted lastmod dates, duplicates, and the 50,000-URL / 50MB limits. It counts your URLs and lists every error and warning so you can fix issues before submitting to Google Search Console. It runs in your browser — free, private, and no signup.
How to use Sitemap Validator
- Paste your XML sitemap or sitemap index.
- Review the detected type and URL count.
- Fix the listed errors and warnings.
Key features
- Detects urlset vs sitemapindex
- Counts URLs and flags the 50k limit
- Checks loc URLs and lastmod dates
- Warns on duplicates and unescaped ampersands
- Private in-browser validation
Frequently asked questions
- Is the Sitemap Validator free?
- Yes. Validate sitemaps free on TheToolss with no signup.
- Does it fetch my sitemap URL?
- No. Paste the XML directly. This keeps it private and lets you validate sitemaps that are not yet live.
- What are the sitemap limits?
- A single sitemap can hold up to 50,000 URLs and 50MB uncompressed. Beyond that, split it and reference the files from a sitemap index.
- What date format should lastmod use?
- Use W3C / ISO 8601, such as 2026-08-22 or 2026-08-22T10:30:00+00:00.
- Is my sitemap uploaded?
- No. Validation runs locally in your browser.