Contentful Detector
Paste any URL and instantly see whether the site is built with Contentful — 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: CMS decides what can be changed and whether it is worth it.
What this is
Contentful is a headless CMS centred on CDN assets and Space APIs. Marketing sites and multi-market editorial teams use it so writers can reshuffle modules without a production deploy. Confirming the stack tells you whether LCP work belongs in image transforms, Delivery API caching, or trimming a heavy client SDK.
How to tell from a public page
- [Contentful] HTML or scripts reference the `ctfassets.net` media host (evidence shows hit count).
- [Contentful] Public markup hits `cdn.contentful.com` or Content Delivery API hosts.
- [Contentful] Source paths expose `/spaces/`-style Space URLs.
- [Contentful] Front-end packages or preview chrome surface official SDK strings.
How to read the result
Mark Contentful confirmed only when public HTML or headers expose reproducible asset or API fingerprints. A press blurb that merely names the vendor without CDN hosts remains only suspected. Absence more often means a reverse proxy that rewrites ctfassets onto a first-party hostname. Agency portfolios that credit the vendor on unrelated stacks create noise. After a hit, audit image transform parameters and entry payload size before touching the front-end framework.
What to do next
Tighten image transforms, cache Delivery API responses, and verify preview chrome never ships to production. If the front end looks React/Next based, continue into Next.js detector. When weighted scores for LCP, images, SEO and accessibility are required together, open run the full performance / images / SEO / accessibility audit on the home page. Keep notes tied to Contentful fingerprints so later audits can re-check the same structural clues.
Related detectors
FAQ
How is Contentful 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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