What Is an AI Website Detector? A Complete Guide
An AI website detector is a tool that inspects a live web page and estimates whether it was generated by an AI website builder or AI coding agent, rather than hand-built by a person. Instead of guessing from how a site looks, a real AI website detector reads the page's actual shipped code — the same HTML your browser receives — looking for the specific technical fingerprints those platforms leave behind.
What an AI website detector actually looks at
The best AI website detectors don't rely on a single clue. Ours checks six independent categories: CDN domains and class-name prefixes specific to design-tool builders, explicit attribution claims from full-stack app generators, client-side calls to an LLM provider's API, hosting and DNS patterns common to AI deployment platforms, counter-signals from traditional CMS platforms that indicate a human-run site, and structural boilerplate typical of unedited, one-shot AI output. Every category that fires is shown with its exact matched evidence, so a result is never just a bare number you have to trust blindly.
Why not just look at the design?
Visual polish is a bad signal. AI-generated designs have gotten good enough that a human eye often can't tell the difference, and plenty of hand-coded sites intentionally borrow the same clean, template-driven look. An AI website detector that only judges appearance will be fooled constantly in both directions. Reading the underlying code — a domain reference that can't be faked without migrating infrastructure, or a class prefix baked into a build pipeline — holds up far better than a visual guess.
What it can't tell you
No AI website detector, including ours, can prove a negative. A site built with a local AI coding agent rather than a hosted builder typically leaves nothing to find at all, because the code was written and deployed the same way a human developer would do it — there's no separate build pipeline to fingerprint. A low score means no evidence was found, not a guarantee that no AI was involved anywhere in the process.
Ready to see it in action? Try the AI website detector on any URL, or read the full methodology behind every signal it checks.