Hook Strength Checker
Paste a hook and see how its structure compares to 600 real hooks across 12 frameworks. Instant, free, and yours to use as many times as you like.
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Get the free 600-hook pack
The exact corpus this score is measured against — all 600 hooks across 10 niches and 12 frameworks, plus the framework reference and a rewriting worksheet. Free.
What this tool does — and does not — measure
It measures structure. Length, sentence count, framework shape, second-person address, concreteness and clarity — each benchmarked against a curated corpus of 600 real hooks (10 niches × 12 frameworks). The 0–100 score is structural fit to that corpus, nothing more.
It does not predict performance. The corpus has no engagement data — no views, likes, clicks or retention for any hook. So this tool cannot tell you a hook will go viral, convert, or outperform another. A high score means “structured like the corpus”, not “proven to work”. Treat the feedback as writing craft, not a forecast.
Free to run at any volume — it uses no AI model, no external API and no network call.