Vercel Detector
Paste any URL and instantly see whether the site is built with Vercel — with the matched evidence.
We do not store the URL you audit. Want the full audit (performance / images / SEO / accessibility + real-browser speed test)? → run the full audit
Why check this
Confirm the platform first: Hosting & CDN decides what can be changed and whether it is worth it.
What this is
Vercel is an application hosting and edge platform identified by x-vercel-id, server: Vercel, vercel.app hosts or /_vercel/ paths. Teams deploy Next.js and other front ends there for preview URLs and edge middleware. Confirming Vercel reframes caching, ISR and middleware latency as platform knobs rather than mysterious origin slowness. It also explains why preview deployments differ from production headers during audits.
How to tell from a public page
- [Vercel] Vercel HTML/source match on `vercel.app` (evidence shows hit count).
- [Vercel] Vercel HTML/source match on `/_vercel/` (evidence shows hit count).
- [Vercel] Vercel response-header match on `"x-vercel-id"`.
- [Vercel] Vercel response-header match on `"server":\s"Vercel"`.
How to read the result
Count Vercel confirmed when HTML or headers expose the product's operational fingerprints in plain sight. Custom domains with header stripping at a secondary CDN can hide Vercel identifiers. Common false positives: README badges mentioning Vercel on a project hosted elsewhere. After a hit: Inspect cache headers, middleware geography and whether ISR paths are actually warm.
What to do next
Inspect cache headers, middleware geography and whether ISR paths are actually warm. Framework pairing is usually Next.js detector. Holistic scoring remains available at run the full performance / images / SEO / accessibility audit on the home page.
Related detectors
FAQ
How is Vercel detected?
From structural signatures in the public HTML and response headers (domains, paths, attributes, scripts). Every verdict lists how many times each pattern matched — nothing is guessed.
Can the result be wrong?
If only a bare brand keyword matches without structural evidence, we label it \u201clikely\u201d instead of \u201cconfirmed\u201d — we would rather under-report than cry wolf.
Do you save the URLs I check?
No. The audit runs inside the request and the URL you paste is not written to storage. There are no third-party tracking scripts on the page either, so no log of who checked what exists. Copy the result yourself if you want a record.
Can a website hide what it is built with?
Partly, but rarely completely. The HTML sent to your browser, the response headers, script paths and asset structure have to be exposed to work, so there is always something readable. Server-side code, build config and private APIs stay invisible. That is why this tool reports the evidence it found rather than claiming a full picture. No match does not mean the technology is absent.
Optimization help is available
Tell me your URL and what you want fixed — you get a clear scope, price and timeline.
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