Semantic Relevance Checker

Compare a piece of content against a target topic and see a semantic coverage score, which supporting terms are present, and which are missing. Runs in your browser.

Live v1.0 · Updated April 2026 Free · No login
Checker Idle
The main topic this content should cover.
Runs locally · nothing sent to a server

How it works

Enter a target topic and paste the content you want to check. The tool builds a list of core terms, vocabulary a well-covered page on that specific topic would typically mention, drawn from a curated map of SEO, AI-search, SaaS, content, growth, and brand terminology matched against your topic, then checks which ones actually appear in your text.

The coverage score out of 100 is based only on those core terms, so it reflects genuine topical depth rather than generic buzzwords. Below the score, a separate supporting vocabulary list shows broader terms (like “strategy” or “audience”) that often appear in strong writing but are optional, present ones are marked, missing ones are just a nudge, not a penalty.

Everything runs locally. Nothing is fetched or sent to a server.

Frequently asked

No. It checks for the presence of a broader set of supporting terms related to your topic, not how many times one exact phrase repeats. That is closer to how modern search and AI-answer systems assess topical depth than old-style keyword stuffing checks.
A curated map of common SEO, AI-search, SaaS, content, growth, and brand vocabulary, matched against words in your topic, plus a set of generic terms most well-rounded content touches on. It is a heuristic, not a live model of any search engine’s actual ranking signals.
The tool only checks for term presence, not writing quality, structure, or accuracy. A well-written piece can still score low if it uses different vocabulary than the tool expects, for a genuinely niche or unusual topic, treat a low score as a prompt to review, not a verdict.
Not necessarily. Some flagged terms may be irrelevant to your specific angle. Use the missing-terms list as a checklist to review, add the ones that genuinely strengthen the piece, and skip the ones that do not fit.