Comparison

Sitemap Index vs Sitemap File

Understand the difference between a sitemap index file and individual sitemap files in the XML sitemap protocol.

Sitemap Index

Strengths

+References multiple sitemap files
+Essential for sites with 50,000+ URLs
+Allows logical organization (by type, section, date)
+Search engines process all referenced sitemaps
+Can include lastmod for each child sitemap

Limitations

-One extra level of indirection for crawlers
-Must keep child sitemap references up to date
-Limited to 50,000 child sitemaps per index

Individual Sitemap

Strengths

+Simple — one file with all URLs
+Sufficient for sites under 50,000 URLs
+Faster for search engines to process
+Easier to manage for small sites

Limitations

-Limited to 50,000 URLs and 50MB per file
-Can become unwieldy for large sites
-No way to organize URLs by section or type

Verdict

Use a single sitemap file for sites under 50,000 URLs. Use a sitemap index when you need to split URLs across multiple files — this is standard for any site with significant content volume.

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