Cloudflare CDN is a globally distributed content delivery network used by millions of websites — from small personal projects to large-scale enterprise platforms — to accelerate performance, improve reliability, and mitigate DDoS threats by routing traffic through Cloudflare's edge infrastructure. As one of the most widely deployed CDNs on the internet, it appears across virtually every category of website, making accurate detection both highly relevant and technically straightforward. AIWebsiteDetector.com identifies Cloudflare CDN deployments by analyzing 2 distinct HTTP response headers that Cloudflare consistently injects into traffic passing through its network, providing a reliable and precise fingerprint for detection. These headers are characteristic of Cloudflare's edge servers and remain present regardless of the underlying origin technology or CMS, which contributes to high detection confidence across diverse site types. Cloudflare CDN is available as part of Cloudflare's broader platform, with a free tier accessible to all users and paid plans unlocking advanced performance and security features — making it one of the few enterprise-grade CDN solutions with significant adoption at the hobbyist and small business level. More details about Cloudflare's CDN offering can be found at the official product page: https://www.cloudflare.com/cdn.
Detect Cloudflare CDN Websites — Free Tool
Enter any URL to check if it was built with Cloudflare CDN. Instant results, no account required.
How we detect Cloudflare CDN — see our methodology: AI Influence Score calculation, evidence tiers, and fingerprint signal types.
How to Detect Cloudflare CDN Websites
HTTP Headers
2 patterns
1. Check the Page Source
Open the website in your browser, right-click, and select "View Page Source". Search for cloudflare cdn-specific patterns in the HTML.
4. Use AI Website Detector (Easiest)
Our automated scanner checks all these signals at once and gives you an instant confidence score. Just enter any URL above.
Frequently Asked Questions
Is this website built with Cloudflare CDN?
You can detect if any website was built with Cloudflare CDN by using our free scanner above. Just enter the URL and we'll analyze HTML patterns, JavaScript files, CDN domains, and HTTP headers to determine if Cloudflare CDN was used — with a confidence score.
How to detect if a website was built with Cloudflare CDN?
There are several ways to detect Cloudflare CDN: (1) View the page source and look for Cloudflare CDN-specific class names or script URLs, (2) Check the Network tab in DevTools for requests to Cloudflare CDN CDN domains, (3) Use our free tool — we check 2 detection signals automatically.
What websites are built with Cloudflare CDN?
Cloudflare CDN is used by thousands of websites worldwide. Our scanner has detected many Cloudflare CDN-built sites across different industries. You can scan any URL to check if it uses Cloudflare CDN.
How accurate is the Cloudflare CDN detection?
Our Cloudflare CDN detection engine checks 2 unique fingerprint signals, achieving high confidence results. We score each match and return a confidence percentage so you know how certain the detection is.
About Cloudflare CDN
Cloudflare CDN is a leading cdn used by thousands of businesses and developers worldwide. Our detection engine can identify Cloudflare CDN-built websites with high confidence by analyzing multiple technical signals.
Whether you're a developer doing competitive research, a designer looking for inspiration, or just curious about how a website was built — AI Website Detector gives you instant, accurate detection.
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Detection Info
- Category
- CDN
- Signals Used
- 2 patterns
- Accuracy
- High
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