Websites Powered by Polyfill
736,411 websites tracked using Polyfill (JavaScript libraries) · polyfill.io
Polyfill is a JavaScript library used to add functionality to web pages. Its official site is polyfill.io. PoweredBy tracks the websites that use Polyfill across the public web; the tracked counts, adoption trend, and site list on this page are updated from our ongoing crawl of the javascript libraries ecosystem.
Usage trend
200K
400K
600K
Aug 2018
Aug 2020
Aug 2022
Aug 2024
Aug 2026
Domains observed using Polyfill in each month's HTTP Archive crawl,
Aug 2018 to Aug 2026 · peak 551,475 in Feb 2024. The tracked total above also
counts sites not re-crawled recently.
Core Web Vitals
LCP 1.8 s
INP 75 ms
CLS 0
TTFB 700 ms
Median site among 65,390 Polyfill sites with Chrome UX data, p75 values, Aug 2026.
Top countries
United States
23,700
United Kingdom
9,959
India
9,406
Canada
8,463
Brazil
8,307
Germany
7,802
France
7,528
Spain
6,155
Sites using Polyfill by audience country, Chrome UX Report.
Top sites by authority
9+
4% · 14 of 372 sites
8+
<1% · 76 of 7,677 sites
7+
<1% · 166 of 45,712 sites
6+
<1% · 275 of 110,136 sites
5+
<1% · 398 of 246,751 sites
The share of the web's most authoritative domains, by Open Page Rank tier, seen running Polyfill in recent crawls. Only 372 domains worldwide score 9 or higher.
Websites using Polyfill
| # | Domain | Open Page RankOPR | Est. monthly visits (US)Visits (US) | Keywords | First seen |
|---|---|---|---|---|---|
| 1 | cloudfront.net | 9.47/10 | - | - | Jan 2019 |
| 2 | github.io | 9.43/10 | 1,800 | 1 | Aug 2018 |
| 3 | blogspot.com | 9.39/10 | - | - | Aug 2018 |
| 4 | who.int | 9.26/10 | 3,114,700 | 778,407 | Feb 2022 |
| 5 | theguardian.com | 9.23/10 | 15,181,100 | 3,912,803 | Aug 2018 |
| 6 | mit.edu | 9.18/10 | 161,200 | 27,360 | Aug 2018 |
| 7 | ft.com | 9.10/10 | 698,500 | 489,218 | Aug 2018 |
| 8 | berkeley.edu | 9.10/10 | 166,900 | 5,412 | Aug 2019 |
| 9 | vercel.app | 9.05/10 | - | - | Aug 2022 |
| 10 | windows.net | 9.04/10 | - | - | Jun 2020 |
| 11 | readthedocs.io | 9.04/10 | - | - | Sep 2022 |
| 12 | netlify.app | 9.01/10 | 2 | 2 | Jun 2020 |
| 13 | umich.edu | 9.01/10 | 36,500 | 1,974 | Aug 2018 |
| 14 | uk.com | 9.00/10 | 2 | 12 | Jan 2019 |
| 15 | ox.ac.uk | 8.98/10 | 214,200 | 93,016 | Oct 2018 |
| 16 | cmu.edu | 8.97/10 | 436,800 | 81,774 | May 2020 |
| 17 | washington.edu | 8.96/10 | 668,000 | 107,419 | Feb 2022 |
| 18 | ipcc.ch | 8.93/10 | 80,900 | 48,331 | Feb 2022 |
| 19 | shop-pro.jp | 8.91/10 | 17 | 9 | Jul 2019 |
| 20 | azurewebsites.net | 8.87/10 | - | - | Jan 2019 |
| 21 | coe.int | 8.86/10 | 138,700 | 44,475 | Jan 2021 |
| 22 | northwestern.edu | 8.86/10 | 193,400 | 45,922 | Jul 2019 |
| 23 | ubc.ca | 8.84/10 | 14,500 | 2,813 | Mar 2020 |
| 24 | illinois.edu | 8.83/10 | 47,000 | 4,065 | Aug 2019 |
| 25 | web.app | 8.76/10 | - | - | Jun 2020 |
| 26 | rutgers.edu | 8.75/10 | 147,400 | 31,478 | Aug 2018 |
| 27 | globo.com | 8.74/10 | 3,500 | 605 | Apr 2019 |
| 28 | liberation.fr | 8.74/10 | 17,600 | 9,405 | Feb 2021 |
| 29 | rochester.edu | 8.71/10 | 240,800 | 70,711 | Aug 2018 |
| 30 | ticketmaster.com | 8.68/10 | 16,868,900 | 1,043,579 | Aug 2018 |
| 31 | gatech.edu | 8.68/10 | 72,600 | 12,653 | Aug 2022 |
| 32 | dc.gov | 8.67/10 | 99,300 | 10,787 | Oct 2020 |
| 33 | unl.edu | 8.67/10 | 64,000 | 6,655 | Dec 2018 |
| 34 | altervista.org | 8.66/10 | - | - | Jan 2019 |
| 35 | idaho.gov | 8.65/10 | 97,600 | 7,310 | Sep 2021 |
| 36 | usp.br | 8.65/10 | 1 | 19 | Aug 2019 |
| 37 | gitlab.io | 8.64/10 | - | - | Feb 2024 |
| 38 | main.jp | 8.64/10 | - | - | Jul 2019 |
| 39 | gencat.cat | 8.63/10 | 86 | 174 | Nov 2018 |
| 40 | torproject.org | 8.62/10 | 287,900 | 11,898 | Oct 2024 |
| 41 | uva.nl | 8.62/10 | 24,400 | 9,670 | Apr 2020 |
| 42 | salesforce-sites.com | 8.58/10 | - | - | Apr 2023 |
| 43 | tvp.pl | 8.58/10 | 1,500 | 1,073 | Mar 2020 |
| 44 | unam.mx | 8.58/10 | 1,900 | 1,196 | Aug 2019 |
| 45 | kyoto-u.ac.jp | 8.57/10 | 4,800 | 3,548 | Jul 2022 |
| 46 | rwth-aachen.de | 8.55/10 | 640 | 1,476 | Oct 2020 |
| 47 | rt.com | 8.53/10 | 155,000 | 10,000 | Oct 2018 |
| 48 | jp.net | 8.52/10 | 66 | 7 | Jan 2021 |
| 49 | imweb.me | 8.50/10 | 5 | 10 | Feb 2026 |
| 50 | public.lu | 8.50/10 | - | - | Mar 2021 |
| 51 | unibas.ch | 8.49/10 | 1,800 | 1,310 | Oct 2025 |
| 52 | adl.org | 8.45/10 | 415,400 | 67,022 | May 2020 |
| 53 | aok.de | 8.44/10 | 25,300 | 3,309 | Dec 2019 |
| 54 | dyndns.org | 8.36/10 | - | - | May 2020 |
| 55 | baltimoresun.com | 8.36/10 | 82,600 | 125,456 | Nov 2018 |
| 56 | org.ru | 8.35/10 | - | - | Feb 2021 |
| 57 | tistory.com | 8.33/10 | 230 | 8 | Jun 2020 |
| 58 | dal.ca | 8.30/10 | 26,100 | 12,945 | Jun 2026 |
| 59 | firebaseapp.com | 8.27/10 | - | - | Aug 2018 |
| 60 | com.ru | 8.27/10 | - | - | Jan 2019 |
| 61 | sciencespo.fr | 8.25/10 | 33,100 | 16,968 | Jul 2020 |
| 62 | nagoya-u.ac.jp | 8.25/10 | 11 | 36 | Feb 2022 |
| 63 | centrepompidou.fr | 8.24/10 | 31,800 | 6,253 | Oct 2022 |
| 64 | au.int | 8.22/10 | 231,600 | 11,160 | Mar 2021 |
| 65 | jnto.go.jp | 8.22/10 | 3,400 | 2,319 | Apr 2019 |
| 66 | usal.es | 8.22/10 | 3,200 | 1,130 | Sep 2020 |
| 67 | serpro.gov.br | 8.18/10 | 380 | 767 | Dec 2020 |
| 68 | wfu.edu | 8.16/10 | 12,200 | 7,427 | Aug 2018 |
| 69 | unifi.it | 8.14/10 | 1,000 | 586 | Jul 2020 |
| 70 | gov.mt | 8.13/10 | 3,400 | 1,456 | Oct 2022 |
| 71 | pr.gov | 8.11/10 | 6,100 | 2,445 | Mar 2022 |
| 72 | flodesk.com | 8.08/10 | 31,000 | 11,457 | Jun 2021 |
| 73 | onrender.com | 8.07/10 | - | - | Oct 2023 |
| 74 | prefeitura.sp.gov.br | 8.07/10 | 3,800 | 5,554 | Aug 2019 |
| 75 | square-enix.com | 8.04/10 | 19,200 | 991 | May 2019 |
| 76 | uva.es | 8.01/10 | 240 | 324 | Oct 2019 |
| 77 | ddns.net | 7.98/10 | - | - | Feb 2020 |
| 78 | ti.ch | 7.98/10 | 4 | 4 | May 2021 |
| 79 | nissan.co.jp | 7.95/10 | 350 | 318 | Feb 2022 |
| 80 | nihon-u.ac.jp | 7.92/10 | 550 | 67 | Mar 2020 |
| 81 | surge.sh | 7.91/10 | 14,400 | 584 | Jun 2026 |
| 82 | jobs.cz | 7.90/10 | 2,000 | 431 | Jul 2020 |
| 83 | rcpsych.ac.uk | 7.88/10 | 19,900 | 12,066 | Feb 2022 |
| 84 | cummins.com | 7.87/10 | 258,300 | 94,807 | Dec 2019 |
| 85 | diia.gov.ua | 7.87/10 | 87 | 92 | May 2020 |
| 86 | gold.ac.uk | 7.86/10 | 14,200 | 13,879 | Feb 2022 |
| 87 | globalgoals.org | 7.85/10 | 27,300 | 25,201 | Jun 2020 |
| 88 | unal.edu.co | 7.85/10 | 1,200 | 240 | Sep 2020 |
| 89 | sch.gr | 7.84/10 | 12 | 33 | Feb 2020 |
| 90 | vutbr.cz | 7.82/10 | 4 | 1 | Aug 2018 |
| 91 | groovehq.com | 7.81/10 | 11,400 | 2,300 | Aug 2018 |
| 92 | portaldaindustria.com.br | 7.80/10 | 1,500 | 412 | Apr 2024 |
| 93 | bakermckenzie.com | 7.78/10 | 17,100 | 10,650 | Feb 2022 |
| 94 | swansea.ac.uk | 7.77/10 | 23,000 | 7,396 | Mar 2023 |
| 95 | u-szeged.hu | 7.74/10 | 880 | 213 | Mar 2023 |
| 96 | vgregion.se | 7.74/10 | 130 | 215 | Dec 2022 |
| 97 | oh.gov | 7.73/10 | - | - | Dec 2020 |
| 98 | telangana.gov.in | 7.72/10 | 1,600 | 468 | Apr 2023 |
| 99 | uam.mx | 7.71/10 | 350 | 1,140 | Jan 2020 |
| 100 | regione.puglia.it | 7.68/10 | 90 | 100 | Oct 2022 |
Open Page Rank is the domain's authority score (0 to 10, from the open web link graph); the list is ordered by it and covers sites seen in recent crawls. Visits and keywords are estimated US organic search figures.
Download top 10,000 as CSV (zip) →
Compare Polyfill
- Polyfill vs jQuery
- Polyfill vs core-js
- Polyfill vs jQuery Migrate
- Polyfill vs jQuery UI
- Polyfill vs Swiper