Free Tool · The 200ms Window

Grade My
Homepage

Paste your developer-tool homepage. Find out whether a developer instantly gets what it is and can see a path to first value — graded the way devs actually skim, not the way a CRO consultant grades a marketing site. We grade the page and the clichés, never you.

By Daria Dovzhikova · Updated June 2026

Built for developer-tool homepages — paste the page a developer lands on first.

No signup for the grade. We grade the page and the clichés, never you.

What the 200ms Window grades

A developer decides whether to stay on your homepage in the first few seconds. They skim for three things: what is this, does it work, and how do I start. Generic CRO graders miss this entirely — a page can ace “hero benefit, single CTA, trust badges” and still lose every developer because it tells instead of shows. Here are the 8 criteria, weighted so the dev-bounce signals count most:

  • One-line value-prop clarity (heaviest — this is what makes a developer stay or leave)
  • 'What is this' in one screen (heaviest — this is what makes a developer stay or leave)
  • Code / visual proof above the fold (heaviest — this is what makes a developer stay or leave)
  • Visible quickstart / time-to-first-value
  • No demo-gating before value
  • Copy concreteness (vs vague adjectives)
  • Dev-credible social proof (vs logo soup)
  • Scannability & mobile legibility

Built by GTM Labs. The grade is a directional read of the page's above-the-fold content, not a full conversion audit. Read more on developer marketing.

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