Free tool
Internal Link Map
See how the pages of a site link to each other: orphan pages nothing points to, pages buried four clicks deep, dead ends, and pages only reachable from the navigation.
Why it matters
Links are how Google decides what matters on your site.
Find orphan pages
CMS pages often exist in the sitemap but nothing links to them, so they rarely rank. The map shows them in red with the page to link from.
Click depth from home
Pages are drawn in rows by how many clicks they are from the home page. Anything past three clicks is a candidate for a hub page or a footer link.
Content links, not just nav
Navigation and footer links are counted separately, so you can see which pages have real in-content links and which only live in the menu.