What does a sitemap-to-topic-clusters tool do?
It uses the URLs in an XML sitemap as a page inventory, reads public on-page signals and groups pages that cover the same subject area. The result describes your existing content structure rather than generating an ideal future topic map.
How to create topic clusters from a sitemap
Read every eligible sitemap URL
Collect titles, headings and page signals
Group genuinely related pages
Identify pillar candidates and unclustered pages
What the output looks like
Each cluster groups pages that appear to cover the same subject and highlights the page that best fits a pillar role. For example, a site might group several implant-related URLs under a dental implants cluster, several braces and aligner pages under orthodontics, and keep utility or isolated URLs unclustered when there is not enough evidence to place them reliably.
Sitemap clustering vs. keyword clustering
Sitemap clustering starts with pages that already exist on a website. Keyword clustering starts with search terms and helps decide which queries should share a page and which need separate URLs. If you are working from keyword research rather than an existing site structure, use the Keyword Mapping Tool.
Topic clusters from a sitemap vs. a complete topic map
A sitemap can show what your website already contains. It cannot tell you by itself which commercially relevant topics are missing or what should be built next. To inspect weak or missing coverage across an existing site, use the Topical Coverage Checker.
When is this useful?
Use it when you inherit an existing website, need a quick content inventory by topic, want to inspect whether a site already has clear pillar-and-supporting relationships, or need a structured starting point before planning missing content.
Why some pages stay unclustered
Not every sitemap URL belongs in a topic cluster. Utility pages, isolated pages and pages whose subject cannot be identified reliably are kept separate instead of being forced into a misleading group.