Fake Door
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Validate before you build

Stop building products nobody wants

Fake Door App Builder turns raw ideas into realistic landing pages, measures what visitors actually do, and tells you which idea is worth your next three months — with data, not guesswork.

Start validating
Ingest ideas in bulk
Upload dozens of product ideas as a single JSON file — problem, features, headline, and CTA.
Generate indexable pages
Each idea instantly becomes a rich, SEO-ready landing page that Google can find and rank.
Measure real behavior
Track traffic, scroll depth, time on page, and high-intent CTA clicks — bots filtered out.
Crown the winner
A leaderboard ranks every idea by conversion rate so you know exactly what to build next.