JavaScript Library & Framework
1,063 of the 1,000,000 top sites in our Tranco top-1M census run Polyfill.io (0.1%). A JavaScript polyfill service that served browser-compatibility shims to older or unsupported browsers from a CDN. Detection is homepage-level HTML/header fingerprinting, so a site can run Polyfill.io on other pages without it showing here.
| # | Domain | Global traffic rank | Contacts |
|---|---|---|---|
| 1 | theguardian.com | #192 (Tranco) | Find emails |
| 2 | guardian.co.uk | #2,366 (Tranco) | Find emails |
| 3 | thehindu.com | #2,899 (Tranco) | Find emails |
| 4 | bancointer.com.br |
| Site | Tranco rank | Also detected | Contacts |
|---|---|---|---|
| biotechusa.fr | #608,558 | Cloudflare, Cloudflare edge/CDN, Font Awesome + 11 more | Find emails |
| loopcv.pro | #609,343 | AOS, Bootstrap, Crisp + 23 more | Find emails |
| playbackvideogames.com | #611,015 | Cloudflare, Cloudflare edge/CDN, Let's Encrypt + 5 more | Find emails |
| #4,979 (Tranco) |
| Find emails |
| 5 | toptoon.com | #9,168 (Tranco) | Find emails |
| merries.co.id | #613,262 | AOS, Bootstrap, Font Awesome + 17 more | Find emails |
| 18yearsold.com | #614,502 | Amazon CloudFront, Amazon Route 53, Bootstrap + 7 more | Find emails |
| capitalsports.at | #614,777 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 10 more | Find emails |
| bycheri.de | #615,098 | Cloudflare edge/CDN, Google Analytics, Google Cloud DNS + 12 more | Find emails |
| purpleleafshop.de | #615,183 | Bootstrap, Cloudflare edge/CDN, ConsentMo + 12 more | Find emails |
| coopnet.jp | #616,035 | AOS, Amazon (ACM), Amazon Route 53 + 6 more | Find emails |
| telfair.org | #619,450 | Font Awesome, Google Tag Manager, Let's Encrypt + 8 more | Find emails |
| teamiu.com | #620,191 | Cloudflare edge/CDN, Google Ads Conversion, Google Analytics + 14 more | Find emails |
| prismashop.fr | #620,355 | Amazon CloudFront, Cloudflare edge/CDN, DigiCert + 2 more | Find emails |
| modelesdebusinessplan.com | #620,707 | Cloudflare edge/CDN, GoAffPro, Google Cloud DNS + 9 more | Find emails |
| kidder.com | #621,222 | Amazon Route 53, Cloudflare Bot Management, Cloudflare edge/CDN + 7 more | Find emails |
| digitalcoo.com | #622,187 | Apache, Bootstrap, Font Awesome + 7 more | Find emails |
| anime4u.org | #623,866 | Blogger, Bootstrap, Cloudflare + 8 more | Find emails |
| kreafolk.com | #624,575 | Cloudflare edge/CDN, Google Analytics, Google Cloud DNS + 6 more | Find emails |
| biotechusa.de | #625,017 | Cloudflare, Cloudflare edge/CDN, Font Awesome + 11 more | Find emails |
| beywarehouse.com | #627,375 | AngularJS, Cloudflare edge/CDN, Fancybox + 15 more | Find emails |
| ecuworldwide.com | #628,118 | Bootstrap, DigiCert, Express + 5 more | Find emails |
| onlinetour.co.kr | #628,204 | Cloudflare, Criteo, Daum + 11 more | Find emails |
| findemeinenschwarm.com | #628,760 | Apache, Font Awesome, Google Tag Manager + 4 more | Find emails |
| interoffice.be | #629,168 | AOS, Apache, Bootstrap + 13 more | Find emails |
| casinokart.com | #630,111 | Cloudflare edge/CDN, Google Hosted Libraries, Google Maps + 10 more | Find emails |
| daemmstoffonline.de | #631,383 | Cloudflare edge/CDN, Google Tag Manager, Let's Encrypt + 7 more | Find emails |
From the Crawlora Website Tech Stack Dataset, a homepage-level fingerprint of a 1,000,000-domain Tranco top-1M census (run top1m-2026-08-25-full-v2), snapshot August 29, 2026. Directional, not exhaustive — fully custom or bundled stacks under-detect. Methodology →