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Hi Product Hunt 👋
I kept running into sites that felt machine-generated and had no way to be sure. Every "AI detector" I tried was itself a language model guessing, with no evidence and a different answer each time.
So I built the opposite. AI Site Check fetches the page server-side and runs 78 named rules against it: generator tags, script hosts, hosting domains, markers inside the JavaScript bundles, code hygiene, metadata and content signals. Each rule has a weight. The same input always produces the same output, and the result page shows you every rule that fired, where it matched, and the exact string — so you can verify the verdict instead of trusting it.
A few things I learned building it:
- Most AI-built sites ship an API key in their JavaScript bundle. Usually Supabase, and often without row-level security on.
- v0 quietly changed its generator tag from v0.dev to v0.app, which broke detection until I validated against live sites.
- Base44 keeps its media host and an auth token in the bundle even after you move to a custom domain.
- A Bolt or v0 project exported and hosted elsewhere leaves no marker at all. The tool says "No AI builder detected" rather than guessing, and I think that's the only honest answer.
Validated against 35 live sites: 7 Lovable, 15 across Base44/Bolt/Replit/v0, 4 classic builders, 9 hand-built. No false positives on the hand-built ones.
It's free. Happy to answer anything about the detection method, and I'd genuinely like to hear about sites where it gets the verdict wrong — there's a report button on every result.
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About AI Site Check on Product Hunt
“Find out if a website was built by an AI builder”
AI Site Check was submitted on Product Hunt and earned 0 upvotes and 1 comments, placing #133 on the daily leaderboard. Paste a URL and find out whether it was built with an AI website builder, with the evidence and a report of concrete fixes.
AI Site Check was featured in Developer Tools (520.4k followers) and Artificial Intelligence (479.9k followers) on Product Hunt. Together, these topics include over 210.7k products, making this a competitive space to launch in.
Who hunted AI Site Check?
AI Site Check was hunted by axiobyte. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
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