AI Builder Detector

Find out which AI or no-code tool built a website.

Scoring

Each detected signal is assigned a weight based on how reliable it is:

HIGH reliability = 10 pts MEDIUM reliability = 5 pts LOW reliability = 2 pts

Signals are grouped by category and each category is capped at 15 pts, so no single signal type can dominate the total score.

Fetch signals

Platform + AI heuristic signals collected from HTML, headers, JS, and visible text

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Score by category

Weights summed per category, each capped at 15 pts, then totalled

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Threshold check

Platform score ≥ 5 wins first. Otherwise AI score ≥ 10 → AI-assisted

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Confidence label

How far the score exceeds its threshold (see table below)

The confidence label reflects how far the score exceeds the minimum threshold for its category — not the raw point value of any individual signal:

Confidence	Platform score	AI score	Meaning
LOW	5 – 7	10 – 14	Barely clears the threshold — one or two weak signals
MEDIUM	8 – 14	15 – 29	Multiple signals agree — reasonable confidence
HIGH	≥ 15	≥ 30	Strong corroborating evidence across signal types

Example — platform-assisted site scoring 5 pts = LOW confidence (just clears threshold of 5):

cdn_urlMEDIUM+5 pts

Total5 pts → platform-assisted · low

Example — AI-assisted site scoring 15 pts = MEDIUM confidence (1.5× the threshold of 10):

buzzword_densityMEDIUM+5 pts

tailwind_stackMEDIUM+5 pts

uniform_structureMEDIUM+5 pts

Total15 pts → ai-assisted · medium

Output Buckets

Platform-assisted — built with a no-code or AI site builder (Framer, Wix, Shopify, etc.)

AI-assisted — code patterns consistent with an AI coding assistant (Claude, Cursor, Copilot, etc.)

No AI signals — no identifiable signals found; likely hand-written

Unknown — could not fetch or analyse the page

Platform Signals

Framer

Subdomain .framer.website / .app / .ai
Server header starting with Framer/
Generator meta tag
Data attributes data-framer-*
CSS variables --framer-font-family etc.
CDN framerusercontent.com

Webflow

Subdomain .webflow.io
Generator meta tag
HTML comment "This site was created in Webflow"
Data attributes data-wf-*
CSS classes w-nav, w-container, w-row
JS globals window.Webflow
CDN assets.website-files.com

Wix

Subdomain .wix.com
Server header: Pepyaka
Header x-meta-site-is-wix-site: 1
Generator meta tag
CSS variables --color_0, --wix-ads-height
DOM IDs SITE_CONTAINER, masterPage
CDN static.parastorage.com
Data attributes data-testid="comp-*", data-mesh-id

Squarespace

Subdomain .squarespace.com
Server header containing "Squarespace"
Generator meta tag
JS globals SQUARESPACE_ROLLUPS, Y.Squarespace
CSS classes sqs-block, sqs-layout
CDN static*.squarespace.com

Shopify

Subdomain .myshopify.com
Header powered-by: Shopify (survives headless)
Header x-shopid (survives headless)
Header shopify-complexity-score
Cookie _shopify_* (survives headless)
JS globals window.Shopify, ShopifyAnalytics
CDN cdn.shopify.com

Lovable

Subdomain .lovable.app
Generator meta tag
JS globals window.__lovable*
Asset paths /lovable-uploads/[UUID]

Bolt

Subdomain .bolt.new, .stackblitz.io
Server header containing "bolt"
Header server-version
Generator meta tag
JS globals window.__bolt*

v0 (Vercel)

Subdomain .v0.dev
Generator meta tag
JS globals window.__v0*

GitHub Pages

Subdomain .github.io
Server header GitHub.com
HTML comment mentioning "Copilot Workspace" (low)

Cursor AI

HTML comment mentioning "Cursor AI" (low)
Meta tag with content "Cursor AI" (low)

AI Heuristic Signals

These fire only when no platform is detected. Score ≥ 10 triggers AI-assisted.

Signal	Conf.	Pts	How detected
shadcn/ui patterns	HIGH	10	Specific class combos from shadcn components (Card, Button, Badge, Dialog), `@radix-ui/` imports, `cn()`/`twMerge`
Inter font	HIGH	10	`fonts.googleapis.com/css.Inter` or `font-family:.Inter`
Tailwind stack	MED	5	≥2 of: verbose flex/grid combos, `sm:/dark:` prefix stacking, color scale shades (slate-500 etc.)
Vite + React SPA	MED	5	`/assets/index-[hash].js` (Vite output) + empty `<div id="root">`
Lucide icons	MED	5	`lucide-react` in script src or `lucide` reference in HTML/JS
Vercel / Netlify hosting	MED	5	Response headers `x-vercel-id` or `x-nf-request-id`
AI generator meta tag	HIGH	10	`<meta name="generator">` containing v0, bolt, lovable, cursor, copilot, claude, chatgpt, gpt
Prototype hosting	LOW	2	Subdomain on `vercel.app`, `netlify.app`, `pages.dev`, `railway.app`, `render.com`, `fly.dev`
Over-commenter comments	LOW	2	Tutorial-style comments explaining obvious code ("This function", "Here we", "Hero section", etc.)
Generic numbered naming	MED	5	≥5 occurrences of `.container-1`, `.wrapper-2`, `.section-3` style names
Placeholder / hallucinated links	LOW	2	`href="#"`, `href="https://example.com"`, `/placeholder`, lorem ipsum in links
AI buzzword density	HIGH	10 / 5 / 2	Visible page text stripped of HTML and scanned for LLM marketing words (seamless, robust, elevate, revolutionize, cutting-edge, empower, leverage, etc.) — high density = likely AI-written copy
"Too clean" code	LOW	2	Zero developer comments (no `// old`, `TODO`, `FIXME`) combined with high `className=` density (>0.15 ratio) — AI code lacks the messy traces of human development
Uniform list structure	MED	5 / 2	5+ `<li>` items with <15% length variation (coefficient of variation) — AI generates suspiciously parallel, equal-length copy