What is a sitemap index file?

A sitemap index file is an XML file that lists multiple individual sitemap files, allowing you to organize large sites across several sitemaps while pointing search engines to all of them from a single entry point.

How many sitemap URLs can I include?

You can include as many sitemap URLs as you need, with a minimum of two required to generate a valid sitemapindex. Google supports up to 50,000 sitemaps referenced within a single sitemap index file.

What happens if a sitemap URL cannot be reached?

If the tool cannot fetch a URL to retrieve its Last-Modified header, a warning is shown in the per-URL status table, but the URL is still included in the generated sitemapindex XML so your file remains complete.

Do I need to provide absolute URLs?

Ideally yes, but if you paste relative paths the optional Base URL field lets you specify a domain so the tool can construct proper absolute URLs for each sitemap loc entry in the output.

Where should I place my sitemap index file?

Place your sitemapindex XML at the root of your domain, for example https://example.com/sitemap.xml, and then submit that URL to Google Search Console and Bing Webmaster Tools so all referenced sitemaps are discovered automatically.

Sitemap Index Generator

Generate a valid XML sitemap index from multiple sitemap URLs. Auto-fetches Last-Modified headers, deduplicates, and exports a ready-to-use sitemapindex file.

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Validate and Deduplicate URLs

Each submitted sitemap URL is validated for proper http or https format, blank lines are silently skipped, and duplicate entries are automatically removed before output is generated.

Auto-Fetch Last-Modified Headers

The tool attempts to reach each sitemap URL and retrieve its Last-Modified header, adding accurate lastmod tags to your sitemapindex XML so search engines know when each sitemap was updated.

Export and Copy with One Click

Preview your pretty-printed sitemapindex XML with line numbers, then download it as a ready-to-deploy .xml file or copy it to your clipboard instantly with the dedicated action buttons.

Frequently asked questions

Everything you might want to know about this tool.

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