Websites Powered by Isotope
2,587,702 websites tracked using Isotope (JavaScript libraries) · isotope.metafizzy.co
Isotope is a JavaScript library used to add functionality to web pages. Its official site is isotope.metafizzy.co. PoweredBy tracks the websites that use Isotope 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
500K
1M
1.5M
Jun 2021
Sep 2022
Dec 2023
Mar 2025
Jun 2026
Domains observed using Isotope in each month's HTTP Archive crawl,
Jun 2021 to Jun 2026 · peak 1,122,803 in Mar 2023. The tracked total above also
counts sites not re-crawled recently.
Core Web Vitals
LCP 2.3 s
INP 75 ms
CLS 0
TTFB 1100 ms
Median site among 848,285 Isotope sites with Chrome UX data, p75 values, Jun 2026.
Top countries
United States
149,923
India
104,432
Italy
75,697
Germany
71,616
Spain
58,984
France
58,750
United Kingdom
55,260
Brazil
49,230
Sites using Isotope by audience country, Chrome UX Report.
Top sites by authority
9+
15% · 56 of 372 sites
8+
11% · 831 of 7,677 sites
7+
7% · 3,121 of 45,712 sites
6+
6% · 6,266 of 110,136 sites
5+
5% · 12,100 of 246,751 sites
The share of the web's most authoritative domains, by Open Page Rank tier, seen running Isotope in recent crawls. Only 372 domains worldwide score 9 or higher.
Websites using Isotope
| # | Domain | Open Page RankOPR | Est. monthly visits (US)Visits (US) | Keywords | First seen |
|---|---|---|---|---|---|
| 1 | europa.eu | 9.57/10 | 42,200 | 31,835 | Jun 2021 |
| 2 | microsoft.com | 9.54/10 | 11,686,100 | 988,151 | Mar 2022 |
| 3 | wordpress.com | 9.50/10 | 466,100 | 94,206 | Jun 2021 |
| 4 | amazonaws.com | 9.50/10 | - | - | Jul 2021 |
| 5 | adobe.com | 9.48/10 | 8,627,700 | 1,068,559 | Nov 2024 |
| 6 | cloudfront.net | 9.47/10 | - | - | Jun 2021 |
| 7 | amazon.com | 9.47/10 | 351,206,500 | 41,126,511 | Aug 2021 |
| 8 | nih.gov | 9.44/10 | 301,200 | 37,339 | Jun 2021 |
| 9 | github.io | 9.43/10 | 1,800 | 1 | Jun 2021 |
| 10 | blogspot.com | 9.39/10 | - | - | Jun 2021 |
| 11 | baidu.com | 9.33/10 | 27,100 | 357 | Dec 2021 |
| 12 | tumblr.com | 9.27/10 | 5,146,200 | 2,235,020 | Jun 2021 |
| 13 | who.int | 9.26/10 | 3,114,700 | 778,407 | Sep 2022 |
| 14 | weebly.com | 9.24/10 | 162,400 | 11,089 | Sep 2021 |
| 15 | harvard.edu | 9.24/10 | 472,900 | 13,570 | Jun 2021 |
| 16 | line.me | 9.23/10 | 57,900 | 397 | Jul 2021 |
| 17 | bund.de | 9.23/10 | - | - | Jun 2021 |
| 18 | ca.gov | 9.23/10 | 1,457,100 | 28,722 | Jun 2021 |
| 19 | fb.com | 9.20/10 | 1 | 4 | Sep 2022 |
| 20 | stanford.edu | 9.19/10 | 3,302,700 | 5,160 | Jun 2021 |
| 21 | mit.edu | 9.18/10 | 161,200 | 27,360 | Jun 2021 |
| 22 | oracle.com | 9.16/10 | 1,406,200 | 203,855 | Jul 2021 |
| 23 | nasa.gov | 9.15/10 | 2,715,500 | 372,280 | Jun 2021 |
| 24 | pages.dev | 9.14/10 | - | - | Apr 2023 |
| 25 | wiley.com | 9.14/10 | 76,900 | 33,308 | Jul 2022 |
| 26 | ibm.com | 9.13/10 | 11,139,500 | 518,522 | Feb 2025 |
| 27 | irs.gov | 9.13/10 | 19,016,800 | 2,129,096 | May 2024 |
| 28 | myshopify.com | 9.12/10 | - | - | Jun 2021 |
| 29 | afternic.com | 9.11/10 | 4,200 | 1,398 | Jul 2023 |
| 30 | squarespace.com | 9.11/10 | 240,100 | 36,138 | Mar 2023 |
| 31 | berkeley.edu | 9.10/10 | 166,900 | 5,412 | Jun 2021 |
| 32 | cornell.edu | 9.10/10 | 242,100 | 23,854 | Jun 2021 |
| 33 | usatoday.com | 9.08/10 | 10,803,700 | 3,413,388 | Jun 2021 |
| 34 | apa.org | 9.07/10 | 1,040,700 | 238,370 | Oct 2021 |
| 35 | state.gov | 9.07/10 | 3,314,200 | 200,218 | Jun 2021 |
| 36 | noaa.gov | 9.07/10 | 1,258,800 | 144,262 | Jun 2021 |
| 37 | unesco.org | 9.06/10 | 294,400 | 71,304 | Jun 2021 |
| 38 | loc.gov | 9.06/10 | 1,940,600 | 291,331 | Jul 2021 |
| 39 | vercel.app | 9.05/10 | - | - | Aug 2022 |
| 40 | house.gov | 9.05/10 | 752,000 | 103,932 | Jun 2021 |
| 41 | free.fr | 9.05/10 | 3,400 | 1,262 | Jun 2021 |
| 42 | wpengine.com | 9.04/10 | 66,500 | 17,967 | Nov 2021 |
| 43 | mayoclinic.org | 9.04/10 | 61,726,300 | 4,533,343 | Jun 2021 |
| 44 | ny.gov | 9.04/10 | 691,300 | 55,212 | Sep 2022 |
| 45 | cpanel.net | 9.03/10 | 20,300 | 4,682 | Sep 2025 |
| 46 | mdpi.com | 9.02/10 | 1,843,600 | 1,928,740 | Oct 2021 |
| 47 | ieee.org | 9.02/10 | 37,200 | 20,161 | Jun 2021 |
| 48 | columbia.edu | 9.02/10 | 770,900 | 41,349 | Jun 2021 |
| 49 | senate.gov | 9.02/10 | 1,931,200 | 175,699 | Jun 2021 |
| 50 | netlify.app | 9.01/10 | 2 | 2 | Jun 2021 |
| 51 | psu.edu | 9.01/10 | 581,600 | 94,595 | Jun 2021 |
| 52 | umich.edu | 9.01/10 | 36,500 | 1,974 | Jun 2021 |
| 53 | yale.edu | 9.01/10 | 177,900 | 6,885 | Jul 2021 |
| 54 | uk.com | 9.00/10 | 2 | 12 | Jun 2021 |
| 55 | upenn.edu | 9.00/10 | 179,200 | 5,457 | Jun 2021 |
| 56 | energy.gov | 9.00/10 | 1,887,700 | 301,694 | Jun 2021 |
| 57 | va.gov | 8.99/10 | 3,933,900 | 1,032,734 | Jul 2021 |
| 58 | azureedge.net | 8.98/10 | - | - | Aug 2022 |
| 59 | ohchr.org | 8.98/10 | 379,200 | 109,533 | Jun 2021 |
| 60 | marriott.com | 8.98/10 | 13,740,800 | 1,485,399 | Jun 2021 |
| 61 | ox.ac.uk | 8.98/10 | 214,200 | 93,016 | Jun 2021 |
| 62 | princeton.edu | 8.98/10 | 246,800 | 50,700 | Jun 2021 |
| 63 | texas.gov | 8.98/10 | 856,400 | 43,777 | Jul 2021 |
| 64 | cmu.edu | 8.97/10 | 436,800 | 81,774 | Jun 2021 |
| 65 | wisc.edu | 8.97/10 | 461,400 | 7,361 | Jun 2021 |
| 66 | clevelandclinic.org | 8.97/10 | 1,900 | 520 | Nov 2025 |
| 67 | meti.go.jp | 8.97/10 | 1,300 | 1,916 | Aug 2022 |
| 68 | washington.edu | 8.96/10 | 668,000 | 107,419 | Jun 2021 |
| 69 | umn.edu | 8.96/10 | 78 | 49 | Jun 2021 |
| 70 | lefigaro.fr | 8.95/10 | 18,400 | 38,648 | Jun 2021 |
| 71 | nsw.gov.au | 8.95/10 | 75,300 | 73,181 | Jun 2021 |
| 72 | mynavi.jp | 8.95/10 | 81 | 14 | Jul 2021 |
| 73 | ethz.ch | 8.95/10 | 12,900 | 11,869 | Jun 2021 |
| 74 | sakura.ne.jp | 8.95/10 | - | - | Jun 2021 |
| 75 | pwc.com | 8.93/10 | 291,600 | 164,788 | Jun 2021 |
| 76 | ucla.edu | 8.93/10 | 412,200 | 14,756 | Jun 2021 |
| 77 | jhu.edu | 8.93/10 | 177,400 | 6,915 | Jun 2021 |
| 78 | wa.gov | 8.93/10 | 719,800 | 8,195 | Jun 2021 |
| 79 | ipcc.ch | 8.93/10 | 80,900 | 48,331 | Jul 2021 |
| 80 | quora.com | 8.92/10 | 80,913,000 | 39,525,278 | Aug 2025 |
| 81 | bayern.de | 8.92/10 | 12,500 | 512 | Jun 2021 |
| 82 | utexas.edu | 8.92/10 | 503,000 | 11,984 | Jul 2021 |
| 83 | uol.com.br | 8.92/10 | 33,600 | 42,015 | Jun 2021 |
| 84 | uchicago.edu | 8.92/10 | 63,700 | 10,331 | Jun 2021 |
| 85 | si.edu | 8.92/10 | 1,458,100 | 152,619 | Jun 2021 |
| 86 | gov.ru | 8.91/10 | 2,700 | 216 | Jun 2021 |
| 87 | withgoogle.com | 8.91/10 | - | - | Jul 2021 |
| 88 | gallup.com | 8.91/10 | 126,500 | 36,270 | Jan 2025 |
| 89 | shop-pro.jp | 8.91/10 | 17 | 9 | Jun 2021 |
| 90 | nyu.edu | 8.90/10 | 674,000 | 142,032 | Jul 2021 |
| 91 | usc.edu | 8.89/10 | 361,000 | 14,987 | Jun 2021 |
| 92 | duke.edu | 8.88/10 | 193,100 | 821 | Jun 2021 |
| 93 | azurewebsites.net | 8.87/10 | - | - | Jun 2021 |
| 94 | appspot.com | 8.87/10 | - | - | Jul 2021 |
| 95 | bmj.com | 8.87/10 | 191,800 | 113,110 | Sep 2021 |
| 96 | cam.ac.uk | 8.87/10 | 208,200 | 35,354 | Jun 2021 |
| 97 | sueddeutsche.de | 8.87/10 | 11,300 | 26,267 | Jun 2021 |
| 98 | us.com | 8.86/10 | 32 | 9 | Jun 2021 |
| 99 | libsyn.com | 8.86/10 | 3,900 | 1,232 | Jun 2021 |
| 100 | purdue.edu | 8.86/10 | 744,800 | 169,159 | Aug 2023 |
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) →
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