I built a free SEO content-cluster generator on Google Autocomplete data (no LLM, no API key)

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DEV Community · Joe Bromley · 2026-06-17 개발(SW)

Joe Bromley

kept hitting the same wall doing SEO: every tool hands you a keyword list, but none hand you an actual content map you can plan a whole site around.

So I built TopicMap – paste one topic, get 60-90 article ideas grouped into 7-9 pillars, each tagged with search intent. A cluster you can hand straight to a writer. Free, no login.

The interesting part: no LLM

The first version used an LLM to generate the map. Two problems: it cost money per generation, and the difficulty scores were guesses – a real SEO would never trust them.

So I rebuilt it on real Google Autocomplete data instead:

  • Recursively expands your topic through Google’s Suggest endpoint (2 levels deep) to harvest 100-800 real queries people actually type
  • Clusters them into pillars by intent (how-to / commercial / transactional / questions)
  • Filters out local-business + geo noise
  • Tags each with intent + an estimated difficulty

No API key, no per-call cost, ~4s per map. Every keyword is a query people genuinely search – not invented.

Honest caveats

  • Difficulty is estimated (from query specificity), not live SERP data. That’s the next thing if people find it useful.
  • Narrow topics return thinner maps – because there’s genuinely less real search demand. It shows you what’s real, it doesn’t pad.

Try it

Free, no login: https://topicmap.app

Would love blunt feedback from SEO + content folks: is the output good enough to plan real content from, or does it read thin? What would make it worth paying for?



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