Free tool
Sitemap index generator
Quick answer
A sitemap index is an XML file that lists other sitemaps, so crawlers find them all from one address. Paste your sitemap URLs, one per line, and the generator writes a valid sitemapindex file with an optional lastmod date. Upload it and name it in robots.txt.
<?xml version="1.0" encoding="UTF-8"?> <sitemapindex xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"> </sitemapindex>
Next step
Add "Sitemap:" followed by the index URL to robots.txt, and submit the index once in Search Console.
Frequently asked questions
What is a sitemap index?
An XML file with a <sitemapindex> root that lists up to 50,000 sitemaps, each in a <sitemap><loc> entry. Crawlers read it to find every sitemap.
Can a sitemap index list another index?
No. The protocol only allows an index to list sitemaps, not other indexes.
Do the sitemaps have to be on the same site?
Yes, for the protocol: a sitemap index should list sitemaps on the same host, unless you have verified both sites in Search Console.
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