JavaScript Library & Framework
16,473 of the 965,200 top sites in our Tranco top-1M census run Modernizr (1.7%). A JavaScript library that detects which HTML5/CSS3 features a browser supports, enabling progressive enhancement. Detection is homepage-level HTML/header fingerprinting, so a site can run Modernizr on other pages without it showing here.
| # | Domain | Global traffic rank | Contacts |
|---|---|---|---|
| 1 | mit.edu | #225 (Tranco) | Find emails |
| 2 | npr.org | #466 (Tranco) | Find emails |
| 3 | uk.com | #532 (Tranco) | Find emails |
| 4 | cornell.edu |
| Site | Tranco rank | Also detected | Contacts |
|---|---|---|---|
| inivanc.com | #539,768 | Bootstrap, Cloudflare, Cloudflare Bot Management + 9 more | Find emails |
| quossl.com | #539,947 | Google Fonts, Let's Encrypt, Nginx + 4 more | Find emails |
| rotaaldia.com | #539,995 | Bootstrap, Cloudflare, Cloudflare edge/CDN + 8 more | Find emails |
| #563 (Tranco) |
| Find emails |
| 5 | python.org | #747 (Tranco) | Find emails |
| eslkidsgames.com | #540,044 | Bootstrap, Cloudflare edge/CDN, Font Awesome + 7 more | Find emails |
| txla.org | #540,064 | Adobe Fonts (Typekit), Cloudflare Bot Management, Cloudflare edge/CDN + 10 more | Find emails |
| brescobroadband.com | #540,084 | Bootstrap, Fastly, Font Awesome + 7 more | Find emails |
| iplabs.it | #540,154 | Font Awesome, Google Analytics, Google Fonts + 5 more | Find emails |
| thearabianpost.com | #540,243 | Cloudflare, Cloudflare edge/CDN, Font Awesome + 10 more | Find emails |
| nnchaber.com | #540,310 | Bootstrap, Font Awesome, Google Analytics + 9 more | Find emails |
| britishbattles.com | #540,390 | Cloudflare, Cloudflare edge/CDN, Google AdSense + 4 more | Find emails |
| rainbowschools.ca | #540,405 | Cloudflare, Cloudflare edge/CDN, Google Maps + 5 more | Find emails |
| visionblackjackgroup.com | #540,409 | Bootstrap, Cloudflare, Cloudflare Web Analytics + 6 more | Find emails |
| nstm.gov.tw | #540,471 | ASP.NET, Font Awesome, Microsoft 365 + 2 more | Find emails |
| amvsonline.com | #540,589 | Amazon (ACM), Amazon Route 53, Amplitude + 11 more | Find emails |
| thegolfwire.com | #540,590 | Amazon Route 53, Backbone.js, Font Awesome + 11 more | Find emails |
| ensafrica.com | #540,629 | DigiCert, Google Analytics, Google Tag Manager + 3 more | Find emails |
| nguoidothi.net.vn | #540,631 | ASP.NET, Google Analytics, Google Tag Manager + 1 more | Find emails |
| cyclesuperstore.ie | #540,657 | Backbone.js, Bootstrap, Google Fonts + 5 more | Find emails |
| fatfreevegan.com | #540,672 | Amazon Advertising, Google Analytics, Google Tag Manager + 4 more | Find emails |
| clinicalconnection.com | #540,770 | ASP.NET, Bootstrap, Cloudflare + 12 more | Find emails |
| travelpack.com | #540,775 | Bootstrap, Font Awesome, PHP + 3 more | Find emails |
| fbu.org.uk | #540,874 | Cloudflare, Cloudflare edge/CDN, Drupal + 7 more | Find emails |
| novaitsolution.com | #540,912 | Bootstrap, Font Awesome, Let's Encrypt + 2 more | Find emails |
| tiger-explorer.com | #540,915 | Amazon Route 53, Google AdSense, Google Fonts + 4 more | Find emails |
| motorcycleproducts.co.uk | #540,948 | Bootstrap, Google Analytics, Google Tag Manager + 3 more | Find emails |
Showing the first 10,000matches — add a filter to narrow.
From the Crawlora Website Tech Stack Dataset, a homepage-level fingerprint of a 965,200-domain Tranco top-1M census (run top1m-2026-08-20-full), snapshot August 21, 2026. Directional, not exhaustive — fully custom or bundled stacks under-detect. Methodology →