Website framework detector
Detect frontend framework clues on a website
Check public evidence for Next.js, Nuxt, Astro, Vite, React, Vue, Svelte, and related frontend tooling.
Try:
What this checks
- Framework and build-tool fingerprints
- Script, HTML, header, and hosted metadata clues
- Full stack context when the framework is hidden by a CDN or platform
How I treat the evidence
Framework detection is rarely one perfect clue. It is usually a set of public fingerprints that point in the same direction.
If a site strips framework markers, WhosBuilt still shows the surrounding evidence so you can decide what to trust.
Can it detect React by itself?
Sometimes. React alone can be bundled away. Framework clues like Next.js, Nuxt, Astro, and Vite are often easier to confirm.
Why is this useful for leads?
Framework plus hosting tells you how a site is likely maintained, whether it may be rebuilt, and what implementation services may fit.