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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