CDN Checker

Detect which CDN a website uses. Identify Cloudflare, Fastly, AWS CloudFront, Akamai, and more from HTTP headers and DNS. Free CDN detector.

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CDN Checker analyzes HTTP response headers to identify which Content Delivery Network a website is using. It detects Cloudflare, AWS CloudFront, Fastly, Akamai, Vercel, Netlify, and more by looking at characteristic headers like cf-ray, x-served-by, x-cache, and server signatures.

How it works

  1. 1Enter the URL of the website
  2. 2Click Check CDN
  3. 3See the detected CDN with confidence level
  4. 4Review which headers triggered the detection

Who uses this tool

  • ✓Developers checking which CDN a competitor uses
  • ✓DevOps engineers verifying CDN is active after configuration
  • ✓Security researchers analyzing infrastructure setup
  • ✓Performance engineers understanding caching behavior
  • ✓Sales teams researching prospect technology stacks

Frequently Asked Questions

How does CDN detection work?
We analyze HTTP response headers for CDN-specific signatures. For example, Cloudflare adds a 'cf-ray' header, Fastly adds 'x-served-by'.
What CDNs can be detected?
Cloudflare, AWS CloudFront, Fastly, Akamai, Vercel, Netlify, BunnyCDN, KeyCDN, StackPath, and more.
Is this free?
Yes, completely free.

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