How does StackLookup detect frontend frameworks like React, Next.js, and Vue?

StackLookup evaluates client-side DOM attributes (such as data-reactroot, __next, data-v-app), script bundle chunk paths, and server response headers to accurately identify React, Next.js, Vue, Nuxt, Svelte, Angular, Astro, and Remix.

Can StackLookup identify hosting providers and CDNs?

Yes, StackLookup functions as a hosting checker and CDN identifier. It examines DNS A and CNAME records, SSL/TLS handshake metadata, and server response headers to determine if a site is hosted on Vercel, Netlify, Cloudflare, AWS CloudFront, Fastly, Hostinger, SiteGround, or Apache/Nginx servers.

Is StackLookup free to use?

Yes, StackLookup is 100% free with unlimited scans. No credit card or account creation is required to analyze website technologies.

Free Website Technology Analyzer & Tech Stack Checker

Q: What is a website technology analyzer or tech stack checker?

A website technology analyzer or tech stack checker is a tool that reverse-engineers a website's frontend and backend infrastructure. It analyzes HTML DOM structures, script namespaces, meta tags, cookies, HTTP headers, and DNS records to reveal what CMS, programming languages, web servers, and third-party tools the website runs on.

Q: How do I check what CMS a website is built with?

To check what CMS a website uses, enter the website address into StackLookup. The engine inspects code markers and identifies CMS platforms including WordPress, Shopify, Webflow, Squarespace, Wix, Ghost, Drupal, Magento, and Joomla within seconds.

Discover the exact frameworks, CMS platforms, CDNs, hosting providers, analytics tags, and databases powering any website in milliseconds.

How to Find What Technologies Any Website Uses

01. Enter Target URL

Type or paste any website domain into the scanner bar (e.g., nextjs.org or gymshark.com).

02. Multi-Angle Audit

StackLookup evaluates HTTP headers, script hashes, DOM namespaces, SSL certificates, and DNS records.

03. Instant Stack Report

Get an instant breakdown of CMS platforms, JavaScript frameworks, hosting networks, analytics, and security posture.

Popular Technologies & CMS Profiles

StackLookup actively tracks over 100+ web frameworks, CMS platforms, CDNs, and infrastructure providers. Browse our technology profiles below:

WordPress CMS Detector → Shopify Store Checker → Next.js Framework Lookup → React.js Library Detector → Webflow Site Checker → Cloudflare CDN Detector → Tailwind CSS Checker → Google Analytics 4 Lookup →

Frequently Asked Questions About Website Stack Analysis

What is a website technology analyzer or tech stack checker?

A website technology analyzer is a specialized scanner that inspects the underlying architecture of web pages. It looks at HTML elements, JavaScript namespaces, meta tags, cookies, HTTP response headers, and DNS configurations to reveal the content management system (CMS), programming languages, web servers, and third-party tools running on the site.

How do I check what CMS a website is built with?

Simply enter the website's URL into StackLookup. The detection engine analyzes unique code signatures and identifies whether the site is powered by WordPress, Shopify, Webflow, Squarespace, Wix, Ghost, Drupal, or Magento in seconds.

How does StackLookup differ from BuiltWith or Wappalyzer?

StackLookup provides instant, real-time live inspections with zero rate limits or paywalls. In addition to client-side DOM analysis, it queries live DNS records (A, MX, TXT, CNAME), tests TLS handshake protocols, grades security headers, and provides AI-powered stack comparisons.