Websites Using Cloudflare

Cloudflare is a global CDN, security and performance provider fronting a large share of the web.

6,975,246 sites detected across 129,313,463 indexed domains refreshed monthly · August 2026

The source-code fingerprint

/cdn-cgi/ Search all 6,975,246 results →

Cloudflare injects /cdn-cgi/ asset paths into pages it serves, email-address obfuscation, Rocket Loader, challenge scripts and the analytics beacon all live under it, so the path marks sites genuinely behind Cloudflare.

Likely false positives: A proxied site with no Cloudflare-injected feature can omit the path, and a page can reference another site's /cdn-cgi/ URL, rare in practice.

Example websites using Cloudflare

These domains all contain the /cdn-cgi/ fingerprint in their homepage source right now. A match is a verified substring of the live page, so confidence is high, the false positives noted above are the main caveat.

medium.com ...};var a=document.createElement('script');a.nonce='';a.src='/cdn-cgi/challenge-platform/scripts/jsd/main.js';document.getElement...
stackoverflow.com ...};var a=document.createElement('script');a.nonce='';a.src='/cdn-cgi/challenge-platform/scripts/jsd/main.js';document.getElement...
discord.com ...once='MTM0LDIzNSwxNDUsMjUxLDEzMywxMTEsMTkwLDEzMw==';a.src='/cdn-cgi/challenge-platform/scripts/jsd/main.js';document.getElement...
payhip.com ... <img src="https://payhip.com/cdn-cgi/image/format=auto,width=600/https://pe56d.s3.amazonaws.com/...
datatracker.ietf.org ...Q5MzIwOQ=='};var a=document.createElement('script');a.src='/cdn-cgi/challenge-platform/scripts/jsd/main.js';document.getElement...
lnk.bio ...ort for the free version, but drop us an email to <a href="/cdn-cgi/l/email-protection#53202623233c2127133f3d387d313a3c" class=...
www.notion.so ...ion.so/zh-tw"/><link rel="preload" as="image" imageSrcSet="/cdn-cgi/image/format=webp,width=1080/front-static/pages/product/sup...
www.acm.org ...="WeChat" />\r\n\t\t\t\t\t</a>\r\n\t\t\t\t</li>\r\n\t\t\t<li>\r\n\t\t\t\t\t<a href="/cdn-cgi/l/email-protection#3253515f5a575e427253515f1c5d4055" target...
www.nist.gov ... </address>\n <p>\n <a href="/cdn-cgi/l/email-protection#cbafa4e6bcaea9a6aab8bfaeb98ba5a2b8bfe5ac...
qz.com ...as="image" fetchPriority="high" imageSrcSet="https://qz.com/cdn-cgi/image/width=128,quality=85,format=auto/https://assets.qz.co...
www.prnewswire.com ....0px;">\r\n<li style="text-align: left;">Submit via <a href="/cdn-cgi/l/email-protection#3343415a4552504a73505a405a5c5d1d505c5e">...
csrc.nist.gov ...xt-right">\r\n Send inquiries to <a href="/cdn-cgi/l/email-protection#73100001105e1a1d02061a010a331d1a00075d14...
www.ietf.org ...kyNzAzNA=='};var a=document.createElement('script');a.src='/cdn-cgi/challenge-platform/scripts/jsd/main.js';document.getElement...
speakerdeck.com ...Y0ODIzMA=='};var a=document.createElement('script');a.src='/cdn-cgi/challenge-platform/scripts/jsd/main.js';document.getElement...
www.anthropic.com ...y(override.toUpperCase());\n return;\n }\n\n fetch('/cdn-cgi/trace')\n .then(function (res) {\n return res.tex...
www.epi.org ...g4NjA5Nw=='};var a=document.createElement('script');a.src='/cdn-cgi/challenge-platform/scripts/jsd/main.js';document.getElement...
www.zendesk.com ...l="preload" as="image" href="https://web-assets.zendesk.com/cdn-cgi/image/q=65,f=auto,width=1600,fit=scale-down/zendesk/pages/h...
buffer.com ...nk rel="preload" as="image" imageSrcSet="https://buffer.com/cdn-cgi/image/width=640,quality=75,format=auto/img/homepage/social-...
nvd.nist.gov ...0">(301) 975-2000</a>\r\n\t\t\t\t\t<br>\r\n\t\t\t\t\t<br>\r\n\t\t\t\t\t<a href="/cdn-cgi/l/email-protection#2a445c4e6a4443595e044d455c">Webmaster</a...
www.smithsonianmag.com ...Y5ODgzMA=='};var a=document.createElement('script');a.src='/cdn-cgi/challenge-platform/scripts/jsd/main.js';document.getElement...
notes.io ... <br>\n <p><b>Email: <a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="2048...
haveibeenpwned.com ...once='8Gu+2eHR/lbcD2AvhhFJ70H1x4DeSkKW0x+9r8CJo0Q=';a.src='/cdn-cgi/challenge-platform/scripts/jsd/main.js';document.getElement...
donorbox.org ...c5MjMyMA=='};var a=document.createElement('script');a.src='/cdn-cgi/challenge-platform/scripts/jsd/main.js';document.getElement...
vlang.io ...Are you using V to build your product or library? <a href="/cdn-cgi/l/email-protection#b4d5d8d1ccd5dad0d1c6929782808fc2d8d5dad3...
acortar.link ...IxNDIzMQ=='};var a=document.createElement('script');a.src='/cdn-cgi/challenge-platform/scripts/jsd/main.js';document.getElement...
www.uci.org ...\n Tel. +41 24 468 58 11\r\n </a>\r\n <a href="/cdn-cgi/l/email-protection#21424e4f55404255615442480f4249"><span cl...
benn.substack.com ...UzNzMwNA=='};var a=document.createElement('script');a.src='/cdn-cgi/challenge-platform/scripts/jsd/main.js';document.getElement...
pydata.org ...div class="et_pb_header_content_wrapper"><p>Email <a href="/cdn-cgi/l/email-protection#7617121b1f1836060f1217021758190411"><spa...
gifct.org ...ct Us</span></h3></div><div class="textwidget"><p><a href="/cdn-cgi/l/email-protection#ee819b9a9c8b8f8d86ae8987888d9ac0819c89">...
www.ons.gov.uk ...gyMzUzNQ=='};var a=document.createElement('script');a.src='/cdn-cgi/challenge-platform/scripts/jsd/main.js';document.getElement...

Showing 30 of 6,975,246 matching sites. Open the full ranked list, inspect the matched source, and export the domain list →

Related technologies

Fastly Amazon CloudFront Akamai

How this works

SearchWebCode indexes the raw HTML, CSS and JavaScript source of public web pages. To find sites using Cloudflare we match the literal fingerprint /cdn-cgi/, the code Cloudflare ships, against that index, then verify each match against the raw source. Counts reflect the current index (129,313,463 domains, refreshed monthly, last built August 2026) and grow as we scale toward the whole web. Run the search yourself to see every match, view the full page source for any result, filter by TLD or regex, and export the domain list.

Comparing adoption across tools? The Web Technology Adoption Report ranks the most common tags in the index side by side.