CDN Check
Detect CDN usage and identify the provider for any domain.
A CDN (Content Delivery Network) is a network of servers that delivers a website's content
from a location physically close to you, which is why pages load fast even when the company
that runs the site is on the other side of the world. This tool tells you whether a website
is using a CDN, and if so, which one (Cloudflare, Fastly, Akamai, Amazon CloudFront, etc.).
Checking...
What a CDN does, in one sentence
It caches a copy of the website at hundreds of edge locations worldwide, so when you visit the site, the data travels from a server near you instead of from the original host across the ocean. That's why most popular sites feel fast no matter where you are.
Why you might want to know
- A site is slow for you — if it doesn't use a CDN, that could be why. Sites on Cloudflare or CloudFront have a much better chance of loading well from anywhere.
- A site is blocking you — CDNs often gate access at the edge. Knowing the CDN tells you which security system you're running into (Cloudflare's challenge page looks very different from Akamai's, etc.).
- You're curious about infrastructure — see what the big names use.
What "no CDN detected" can mean
- The site really doesn't use a CDN (common for small / personal sites).
- The site uses a private or custom CDN that doesn't match the public patterns we look for (Apple, Netflix, and similar at-scale companies do this).
- The site uses one CDN for HTML but a different CDN for images/videos — we check the main domain.