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Websites using Polyfill

JavaScript libraries Visit polyfill.io

Polyfill is a service which accepts a request for a set of browser features and returns only the polyfills that are needed by the requesting browser.

Lead List Exporter

19.7k live Polyfill sites, ready to export.

That's how many Polyfill websites are in VersionDB right now, each with its full tech stack, contact details, and social profiles.

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Polyfill companies in the United States

Every Polyfill website we detected in the United States.

Companies with personnel emails

Only sites where a personal, company-hosted email was found.

Decision makers on LinkedIn

Sites with at least one personnel LinkedIn profile.

Top 100,000 Polyfill sites by traffic

Start with the highest-traffic end of the dataset.

Sites on a .com domain

Limit results to Polyfill websites on .com domains.

Companies with phone numbers

Only sites where an organisation phone number was found.

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Versions

Which Polyfill versions are most used?

We could read a version number on 100% of Polyfill sites. Of those, the most common are Polyfill 3, on 12,490 sites, Polyfill 2, on 7,190 sites and Polyfill 1, on 45 sites.

63% on v3
Versions detected
3
Sites with a version
19,725
Share of sites by version
v3 63% v2 36% v1 <1%
Live Websites

Websites Using Polyfill

A sample of live Polyfill sites from our latest crawl, with the other technologies each one runs.

Open in the Lead List Exporter
DomainAlso runsCrawl Date
luyacoffee.com
jQueryPHPMySQLWordPressNginx
September 28, 2026
lustvollflirten.com
HTTP/3Apache HTTP ServerGoogle Tag ManagerGoogle CloudGoogle Cloud CDN
September 27, 2026
lookingforlocals.co.uk
HTTP/3Apache HTTP ServerGoogle Tag ManagerGoogle CloudGoogle Cloud CDN
September 27, 2026
kosdegmedmeg.com
HTTP/3Apache HTTP ServerGoogle Tag ManagerGoogle CloudGoogle Cloud CDN
September 27, 2026
ichwilldichjetzt.com
HTTP/3Apache HTTP ServerGoogle Tag ManagerGoogle CloudGoogle Cloud CDN
September 27, 2026
hildashoop.ir
jQueryPHPMySQLHTTP/3WordPress
September 27, 2026
hetematcher.com
HTTP/3Apache HTTP ServerGoogle Tag ManagerGoogle CloudGoogle Cloud CDN
September 27, 2026
gotowanazabawe.com
HTTP/3Apache HTTP ServerGoogle Tag ManagerGoogle CloudGoogle Cloud CDN
September 27, 2026
flirtyneighbour.com
HTTP/3Apache HTTP ServerGoogle Tag ManagerGoogle CloudGoogle Cloud CDN
September 27, 2026
flirtyneighborhood.com
HTTP/3Apache HTTP ServerGoogle Tag ManagerGoogle CloudGoogle Cloud CDN
September 27, 2026

How many websites use Polyfill?

We found Polyfill on 19,725 websites in our September 2026 crawl, across 135 countries.

Which countries use Polyfill the most?

By number of websites, the top countries are United States (19%, 3,702 sites), Japan (12%, 2,366 sites), France (6%, 1,142 sites), Germany (6%, 1,108 sites) and United Kingdom (5%, 961 sites). Together they account for 47% of the 19,725 Polyfill sites we track. 40% of the sites are in English, and .com is the most used domain ending, on 40% of them.

Where are Polyfill websites hosted?

The networks carrying the most Polyfill sites are Fastly, Inc. (2,302 sites), Amazon.com, Inc. (2,129 sites) and Xserver Inc. (1,029 sites).

What technologies are used with Polyfill?

Across the 19,725 Polyfill sites we track, the technologies most often found alongside it are jQuery (67%, 13,291 sites), PHP (50%, 9,941 sites), Nginx (35%, 6,976 sites), Bootstrap (35%, 6,887 sites) and MySQL (34%, 6,633 sites).

Deep Dive

Breakdown of Polyfill websites

What else they run, plus their language, hosting network, domain extension and country.

Same category

Other technologies in JavaScript libraries

JavaScript libraries technologies run on 57.54% of the websites we track. Polyfill ranks #74 of 187, on 0.07% of JavaScript libraries sites.

All JavaScript libraries technologies

FAQ

Answers drawn from our latest crawl of Polyfill websites. Anything else, email us and we will look it up.

Through our own crawl, which checks each site's HTML, scripts and headers rather than relying on self-reported data.