Detect the Framework Behind
Any Website
Enter any URL to identify its JavaScript framework, CSS library, and full tech stack. React, Next.js, Vue, Angular, Svelte, Tailwind — detected in seconds.
Frameworks & Libraries We Detect
We identify 100+ frameworks across every layer of the web stack — from frontend rendering libraries to build tools and server-side signals.
Frontend JS Frameworks
Full-Stack / Meta Frameworks
CSS Frameworks & Libraries
Build Tools & Bundlers
Backend / Server Signals
Other Libraries
Frameworks With a Dedicated Detection Guide
Click any one for its full detection signals, confidence breakdown, and FAQ.
Alpine.js
JavaScript Framework
Angular
JavaScript Framework
Ant Design
UI Library
Apollo GraphQL
JavaScript Framework
ASP.NET
Backend Framework
Astro
Static Site Generator
Bootstrap
CSS Framework
CakePHP
PHP Framework
Capacitor
Mobile / Cross-Platform
Chakra UI
UI Library
CodeIgniter
PHP Framework
DaisyUI
CSS Framework
Django
Backend Framework
Docusaurus
Static Site Generator
Eleventy
Static Site Generator
Ember.js
JavaScript Framework
Express.js
JavaScript Framework
FastAPI
Backend Framework
Flask
Backend Framework
Flowbite
CSS Framework
Flutter Web
Mobile / Cross-Platform
Font Awesome
UI Library
Gatsby
JavaScript Framework
Google Fonts
UI Library
Gridsome
Static Site Generator
GSAP
UI Library
Headless UI
UI Library
HTMX
JavaScript Framework
Hugo
Static Site Generator
Jekyll
Static Site Generator
Laravel
PHP Framework
Mantine
UI Library
Material UI
UI Library
Materialize
CSS Framework
NestJS
Backend Framework
Next.js
JavaScript Framework
Nuxt
JavaScript Framework
Nuxt.js
JavaScript Framework
PHP
Backend Framework
Preact
JavaScript Framework
Qwik
JavaScript Framework
Radix UI
UI Library
React
JavaScript Framework
React Native Web
Mobile / Cross-Platform
RedwoodJS
JavaScript Framework
Remix
JavaScript Framework
Ruby on Rails
Backend Framework
shadcn/ui
UI Library
Solid.js
JavaScript Framework
Spring Boot
Backend Framework
Svelte
JavaScript Framework
SvelteKit
JavaScript Framework
Symfony
PHP Framework
Tailwind CSS
CSS Framework
Three.js
UI Library
Vite
JavaScript Framework
VitePress
Static Site Generator
Vue.js
JavaScript Framework
VuePress
Static Site Generator
Most Popular JavaScript Framework in 2026
Data last updated: September 6, 2026. Based on the number of websites using each tool and its share of all websites we've tracked in the JavaScript Framework category.
Next.js
Used by 81.84% of websites in category JavaScript Framework
Browse 2,659 websites built with Next.js
Express.js
Used by 6.99% of websites in category JavaScript Framework
Browse 227 websites built with Express.js
Nuxt
Used by 3.26% of websites in category JavaScript Framework
Browse 106 websites built with Nuxt
Alpine.js
Used by 2.62% of websites in category JavaScript Framework
Browse 85 websites built with Alpine.js
React
Used by 1.57% of websites in category JavaScript Framework
Browse 51 websites built with React
Nuxt.js
Used by 1.29% of websites in category JavaScript Framework
Browse 42 websites built with Nuxt.js
Angular
Used by 0.92% of websites in category JavaScript Framework
Browse 30 websites built with Angular
Gatsby
Used by 0.40% of websites in category JavaScript Framework
Browse 13 websites built with Gatsby
HTMX
Used by 0.40% of websites in category JavaScript Framework
Browse 13 websites built with HTMX
Vue.js
Used by 0.31% of websites in category JavaScript Framework
Browse 10 websites built with Vue.js
Vite
Used by 0.18% of websites in category JavaScript Framework
Browse 6 websites built with Vite
Ember.js
Used by 0.15% of websites in category JavaScript Framework
Browse 5 websites built with Ember.js
SvelteKit
Used by 0.06% of websites in category JavaScript Framework
Browse 2 websites built with SvelteKit
Remix
Used by 0.00% of websites in category JavaScript Framework
Browse 0 websites built with Remix
Apollo GraphQL
Used by 0.00% of websites in category JavaScript Framework
Browse 0 websites built with Apollo GraphQL
RedwoodJS
Used by 0.00% of websites in category JavaScript Framework
Browse 0 websites built with RedwoodJS
Svelte
Used by 0.00% of websites in category JavaScript Framework
Browse 0 websites built with Svelte
Qwik
Used by 0.00% of websites in category JavaScript Framework
Browse 0 websites built with Qwik
Preact
Used by 0.00% of websites in category JavaScript Framework
Browse 0 websites built with Preact
Solid.js
Used by 0.00% of websites in category JavaScript Framework
Browse 0 websites built with Solid.js
FAQ — Most Popular JavaScript Framework
What is the most popular JavaScript Framework in 2026?
The most popular JavaScript Framework in 2026 is Next.js, used by 81.84% of the websites we've tracked in this category.
How is the popularity calculated?
Popularity is based on the number of unique websites our scanner has detected using each tool, and each tool's share of all 3,249 websites tracked in the JavaScript Framework category.
How often is the data updated?
Counts are live and reflect our current scan database, refreshed roughly every hour.
How many websites are in the JavaScript Framework category?
There are 3,249 tracked websites in the JavaScript Framework category so far.
How Framework Detection Works
Script Tags & Bundles
Scans script src attributes for framework-specific CDN URLs and chunk names.
HTML Attributes & Comments
Reads data-* attributes, ng-* attributes, v-* directives, and framework-injected HTML comments.
CSS Class Patterns
Detects Tailwind utility classes, Bootstrap grid classes, and other CSS framework signatures.
HTTP Headers
Checks X-Powered-By, X-Generator, and custom response headers for framework hints.
Global JavaScript Variables
Inspects window globals like __NEXT_DATA__, __vue_router__, and React DevTools hooks.
Meta Tags
Reads generator meta tags and framework-injected meta properties.
Why Use a Framework Detector?
- →Research competitor tech stacks before building your own product
- →Verify that a website was actually built with the framework a developer claims
- →Identify which frameworks are trending among top-performing websites
- →Find freelance or agency opportunities by detecting outdated tech stacks
- →Benchmark your own site's tech stack against industry leaders
Frontend Framework Comparison
The most commonly detected frameworks across the websites we scan — with their typical detection signals.
| Framework | Type | Primary detection signal | Common pairing |
|---|---|---|---|
| React | UI library | __REACT_DEVTOOLS__ global | Next.js, Vite, Tailwind |
| Next.js | Full-stack | __NEXT_DATA__ JSON in HTML | React, Tailwind, Vercel |
| Vue.js | UI framework | __vue__ global / v-* attributes | Nuxt, Vite, Pinia |
| Angular | UI framework | ng-* attributes + Zone.js | RxJS, TypeScript, Material |
| Svelte | Compiler/UI | svelte-* CSS class names | SvelteKit, Vite |
| Astro | Static/hybrid | /_astro/ asset paths | React, Tailwind, Netlify |
| Tailwind CSS | CSS utility | Utility class patterns (flex, py-*) | Any framework |
Frequently Asked Questions
How does the framework detector work?
We analyze the website's JavaScript bundles, script tags, HTML attributes, CSS class patterns, and HTTP headers for framework-specific fingerprints. For example, React leaves __REACT_DEVTOOLS__ globals, Next.js uses __NEXT_DATA__ JSON, and Tailwind produces a recognizable utility class pattern.
Which frameworks can you detect?
We detect 100+ frameworks and libraries including React, Next.js, Vue.js, Angular, Svelte, Astro, Nuxt, Remix, SvelteKit, Alpine.js, HTMX, Tailwind CSS, Vite, Gatsby, and many more.
Can you detect both frontend and backend frameworks?
We focus on client-side signals that are visible in the browser. Backend frameworks like Django or Rails often leave fingerprints in HTTP headers (e.g. X-Powered-By), which we also check.
What if a site uses multiple frameworks?
We report all detected frameworks — it's common for a site to use Next.js (full-stack framework), Tailwind CSS (styling), and React Query (data fetching) simultaneously. All are listed.
Is the framework detector free?
Yes. Scan any URL for free, unlimited times. No account required.
How is this different from BuiltWith or Wappalyzer?
We run a live scan on demand rather than using a cached database. This means you always get fresh, up-to-date results — even if a site recently migrated frameworks.