About XML Sitemap Validator & Syntax Inspector
Validate XML sitemaps against the official W3C and Sitemaps.org 0.9 XML schema specifications. Detect broken XML tags, unescaped characters, missing <loc> tags, invalid changefreq values, and URL counts entirely in your browser.
Key Capabilities & Features
- Validates sitemaps against the official sitemaps.org 0.9 XML namespace
- Detects XML syntax errors, malformed tags, and missing closing brackets
- Checks for invalid changefreq values and out-of-range priority values (0.0 - 1.0)
- Counts total URLs and warns if exceeding Google 50,000 URL limit
- Detailed line-by-line error and warning reporting
How to Use XML Sitemap Validator & Syntax Inspector
1
Paste Sitemap XML
Paste the XML sitemap source code into the validator.
2
Run Validation
The parser instantly validates syntax and schema compliance.
3
Review Issues
Fix any reported errors before submitting to Google Search Console.
Privacy & In-Browser Execution Guarantee
100% Client-Side. Your sitemap XML is parsed with browser DOMParser with zero upload.
Frequently Asked Questions
What is the maximum allowed size for an XML sitemap?
Google and Bing limit a single uncompressed XML sitemap file to 50MB and 50,000 URLs. Larger sites must use a Sitemap Index file.
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