Free Topical Authority Mapper

Topical authority is the SEO concept that pages covering a topic comprehensively rank and get cited more than pages that touch a topic shallowly. The hard part is knowing what "comprehensive" means for YOUR topic: there's no universal subtopic list. Our tool inverts the problem: you tell us the subtopics you intend to cover, and we tell you which ones actually made it into the page body with enough context to count.

The detection is text-based and exact. For each subtopic you list, we (1) count case-insensitive whole-phrase matches in the page body, and (2) check whether at least one match is surrounded by 200+ characters of paragraph text (signals it's discussed, not just mentioned in a heading). Coverage verdicts: Covered (2+ mentions with paragraph context), Thin (1 mention, or mentions only in headings/short fragments), Absent (zero mentions anywhere in the body).

The headline output is the subtopic coverage grid: one tile per subtopic, color-coded by verdict, absent tiles surfaced first. Below the grid, a fix list groups gaps by severity (Absent first, then Thin) with a tactical action for each one ("Add 2-3 sentences explaining X" / "Expand the section about Y"). The overall coverage score rolls each subtopic up: covered = 1.0, thin = 0.5, absent = 0.0, normalized to 0-100.

Honest scope note

The visual topic graph showing your entire content cluster is on the roadmap but requires a full-site crawl. This v1 ships the part of the value proposition we can deliver from a single URL audit: per-subtopic coverage you can ship a fix for today.

For Content Strategists

• Audit content briefs against the actual output: did the writer cover every subtopic the brief listed?
• Catch the common failure: a brief with 10 subtopics where the final post only meaningfully covers 4

For SEO Leads

• Run on competitor pages with your intended subtopic list to see what coverage you need to match
• Build a content-update queue: every page with 3+ Absent subtopics goes on the rewrite list

Why Use the Topical Authority Mapper

• You supply the subtopics, not an algorithm: No assumptions about your industry or audience. Whatever subtopics matter for your page, you list them.
• Coverage is binary-with-context: A subtopic mentioned only in a heading is "thin", not "covered". Heading mentions signal intent; only paragraph context signals depth.
• Action-list ordered by gap size: Absent subtopics first (biggest leverage), then thin ones. Each item is a one-sentence change you can ship today.
• Free, no signup: One URL audit per request. Per-IP rate limit (5/hour, 15/day).