Website Framework Detector

Find out which frontend framework a website is built with, along with the CSS framework and libraries layered on top.

We only analyze publicly accessible website information.

Try:

What we look for

Hydration payloads such as __NEXT_DATA__, __NUXT__ and __remixContext
Build output directories like /_next/, /_nuxt/ and /_app/immutable/
Attribute fingerprints such as ng-version, data-v-app and astro-island
Bundle filenames for React, Vue, jQuery, GSAP and other libraries

Frontend and CSS together

The report separates the JavaScript framework from the CSS framework, so you can see, for example, a Next.js app styled with Tailwind CSS and animated with GSAP in one view.

Confidence, not guesswork

Every match lists the exact signal it came from. Weak single signals are labelled medium or low confidence so you can judge the evidence yourself.