Free XML Sitemap Validator & AI SEO Analyzer

2 min read • 396 words
Instantly check your XML sitemaps for SEO errors, validate syntax, find dead links, and get AI-powered fixes to improve your Google ranking.
Optimize Your Sitemap for Search Engines Sitemap Validator & AI Analyzer 100 0 0 ${err.type} ${err.count.toLocaleString()} ${err.count === 1 ? 'issue' : 'issues'} ${isDanger ? 'Critical Error' : 'Warning'} Common Sitemap Problems (FAQ) What causes a "Fatal Syntax Error" in my sitemap? Why do I get a "Missing XML Declaration" error? What does the "Not Absolute URL" warning mean? Why is my sitemap flagged for exceeding limits? What is the correct date format for a sitemap?

Optimize Your Sitemap for Search Engines  

Use this free tool to parse, analyze, and debug your XML sitemaps or sitemap indexes before submitting them to Google Search Console.

What this tool does:

  • Syntax Checking: Instantly catches broken tags, unescaped characters, and missing declarations.
  • Status Code Pinging: Verifies that your URLs are returning healthy 200 OK statuses instead of dead links.
  • AI Diagnostics: Paste your raw XML code or fetch a live URL to get targeted, AI-powered code corrections for any SEO errors found.

Sitemap Validator & AI Analyzer

Note: Fetching external URLs may be blocked by CORS unless they are on the same domain.
Analyzing Sitemap...

Initiating fetch...

Health Score

100

Total URLs

0

Child Sitemaps

0

Included Sitemaps
Sitemap URLLast Modified
URL List
Page 1
URL PathStatusLast ModifiedChange FreqPriority

Common Sitemap Problems (FAQ)

If the validator caught an issue, here is a quick reference guide to the most common XML sitemap errors and what they mean.

This usually happens due to unclosed tags (like <url> without </url>), missing quotation marks around attributes, or unescaped characters. For example, if your URL contains an ampersand (&), it must be escaped as &amp; in XML.

Every valid XML sitemap must start with <?xml version="1.0" encoding="UTF-8"?> on the absolute very first line. Even a single blank space or line break before this declaration will cause validation to fail.

Search engines require full, absolute URLs in sitemaps. This means your <loc> tags must contain links starting with http:// or https://. Relative paths like /about-us will be rejected by crawlers.

Google and other search engines enforce a strict limit of 50,000 URLs per sitemap file, and the file size must not exceed 50MB (uncompressed). If your site exceeds this, you must split your URLs into multiple child sitemaps and wrap them in a Sitemap Index file.

The <lastmod> tag requires the W3C Datetime format. You must use dashes (YYYY-MM-DD), such as 2026-07-22, instead of slashes. More specific timestamps like YYYY-MM-DDThh:mm:ssTZD are also acceptable.