Next.js is a React-based web framework developed by Vercel, widely adopted by developers and engineering teams building production-grade web applications that require server-side rendering, static site generation, or hybrid routing architectures. AIWebsiteDetector.com identifies Next.js deployments through a combination of 2 script patterns, 2 HTML patterns, and 1 HTTP header — a multi-signal approach that yields reliable identification even when sites are deployed behind CDNs or custom domains. Common detection markers include inline script references to Next.js chunk files, characteristic `__NEXT_DATA__` JSON blocks embedded in page HTML, and the `x-powered-by: Next.js` HTTP response header present on many default deployments. The HTML-level patterns are particularly robust, as the `__NEXT_DATA__` script tag is injected server-side and persists across most configurations unless explicitly suppressed. Next.js sites are most frequently hosted on Vercel's infrastructure, though deployments on AWS, Netlify, and self-hosted Node.js servers are common — making header-based signals less universally reliable than the DOM and script pattern checks. The framework's official documentation and resources can be found at [nextjs.org](https://nextjs.org).
Detect Next.js Websites — Free Tool
Enter any URL to check if it was built with Next.js. Instant results, no account required.
How we detect Next.js — see our methodology: AI Influence Score calculation, evidence tiers, and fingerprint signal types.
How to Detect Next.js Websites
Script Patterns
2 patterns
HTML Patterns
2 patterns
HTTP Headers
1 patterns
1. Check the Page Source
Open the website in your browser, right-click, and select "View Page Source". Search for next.js-specific patterns in the HTML.
2. Look for Script Files
Check the Network tab in DevTools for JavaScript files loaded from Next.js domains.
4. Use AI Website Detector (Easiest)
Our automated scanner checks all these signals at once and gives you an instant confidence score. Just enter any URL above.
Frequently Asked Questions
Is this website built with Next.js?
Paste the URL into the free scanner above. We check for Next.js-specific signals including the _next/ asset path, Next.js data attributes, build ID patterns, and Vercel deployment headers — and return a confidence score instantly.
What is Next.js?
Next.js is an open-source React framework built by Vercel. It supports server-side rendering (SSR), static site generation (SSG), and hybrid rendering. It is the most widely used React framework for production web applications.
How do you detect a Next.js website?
Next.js sites load all assets from the /_next/ path and include a __NEXT_DATA__ JSON script tag in the HTML. Build ID patterns and Vercel deployment headers are also reliable signals. Our scanner checks all of these automatically.
Does Next.js mean a site was built with AI?
Not necessarily. Next.js is used by both hand-coded projects and AI-generated apps. Our scanner distinguishes between these by looking for additional AI builder signals (like Lovable or v0 fingerprints) or AI coding signals (shadcn/ui, Radix UI components) on top of the framework detection.
Is Next.js better than Remix?
Next.js has a larger ecosystem, more built-in features (ISR, Image Optimisation, Middleware), and is backed by Vercel's infrastructure. Remix is more focused on web standards and has a different approach to data loading. Next.js is safer for most projects; Remix appeals to developers who prefer closer alignment with native browser APIs.
Is Next.js free to use?
Yes — Next.js is fully open source and free. Hosting costs money, but Vercel offers a generous free tier for hobby projects. Self-hosting on any Node.js server or container platform is also free.
About Next.js
Next.js is a leading ai coding tool used by thousands of businesses and developers worldwide. Our detection engine can identify Next.js-built websites with high confidence by analyzing multiple technical signals.
Whether you're a developer doing competitive research, a designer looking for inspiration, or just curious about how a website was built — AI Website Detector gives you instant, accurate detection.
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Detection Info
- Category
- AI Coding Tool
- Signals Used
- 5 patterns
- Accuracy
- High
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