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Sitemap URLs Comparison Tool

Compare two sitemaps to track URL changes, detect removals, and validate new coverage.

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Tool 01

Sitemap URLs Comparison Tool

Compare two sitemaps to find differences in URLs. Perfect for tracking changes, comparing versions, and SEO change management.

Compare sitemaps
Enter two sitemap URLs to see what changed.

Enter the URL of the first sitemap to compare.

Enter the URL of the second sitemap to compare against.

Comparison report
See added, removed, and unchanged URLs.
Run the comparison to generate the report.

How it works

Sitemap URLs Comparison Tool: methodology and worked example

How this tool computes its result

Fetches two sitemap URLs in parallel (each capped at 200,000 URLs), builds a Set from each URL list, and classifies every second-sitemap URL absent from the first as "added," every first-sitemap URL absent from the second as "removed," and every first-sitemap URL still present in the second as "unchanged." Comparison is exact string equality on the full URL -- there is no normalization of trailing slashes, query parameters, or protocol before comparing.

Worked example

Comparing a 1,000-URL sitemap against a newer 1,020-URL version, where 15 URLs are genuinely new and 5 were removed: Added URLs reports 15, Removed URLs reports 5, and Unchanged URLs reports 995 (1,000 minus the 5 removed).

When not to use this tool

Because matching is exact string comparison, a URL that only changed by gaining a trailing slash, switching http to https, or picking up a tracking query parameter shows up as both removed (old form) and added (new form) even though it is the same page -- there is no fuzzy or normalized matching pass.

Common mistakes

  • - Comparing a staging sitemap against production on a different domain and being surprised every single URL shows as added/removed -- the domain is part of the compared string, so a domain-only difference makes every URL look changed.
  • - Not accounting for independent truncation -- if one sitemap exceeds 200,000 URLs and the other doesn't, the larger one's "removed" count can be inflated by URLs that were never fetched in the first place, not actually gone.
  • - Reading "Unchanged URLs" as "unchanged content" -- it only confirms the URL string exists in both sitemaps, not that the underlying page, lastmod, or priority values are identical.

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