Websites Powered by W3.CSS
26,894 websites tracked using W3.CSS (UI frameworks) · www.w3schools.com
W3.CSS is a UI/CSS framework used to style and lay out the site. Its official site is w3schools.com. PoweredBy tracks the websites that use W3.CSS across the public web; the tracked counts, adoption trend, and site list on this page are updated from our ongoing crawl of the ui frameworks ecosystem.
Usage trend
5K
10K
15K
May 2023
Mar 2024
Jan 2025
Nov 2025
Sep 2026
Domains observed using W3.CSS in each month's HTTP Archive crawl,
May 2023 to Sep 2026 · peak 12,792 in Jun 2023. The tracked total above also
counts sites not re-crawled recently.
Core Web Vitals
LCP 1.6 s
INP 75 ms
CLS 0
TTFB 700 ms
Median site among 9,480 W3.CSS sites with Chrome UX data, p75 values, Sep 2026.
Top countries
India
2,142
United States
2,024
Indonesia
1,103
Thailand
977
Brazil
872
United Kingdom
868
Germany
860
France
800
Sites using W3.CSS by audience country, Chrome UX Report.
Usage by industry
| Industry | Share | Websites |
|---|---|---|
| Government | 0.22% | 18 |
| Education | 0.10% | 51 |
| Automotive | 0.08% | 55 |
| Blogs and publishing | 0.08% | 19 |
| Non-profit and religious | 0.06% | 5 |
| Finance and insurance | 0.05% | 8 |
| Sports and fitness | 0.05% | 8 |
| Arts and entertainment | 0.04% | 18 |
| Real estate | 0.04% | 29 |
| News and media | 0.04% | 16 |
| Professional services | 0.03% | 14 |
| Healthcare | 0.03% | 27 |
Share of each industry's websites with a detected stack that use W3.CSS; industries come from what sites declare in their own structured data.
Top sites by authority
9+
4% · 14 of 372 sites
8+
2% · 121 of 7,677 sites
7+
<1% · 268 of 45,712 sites
6+
<1% · 386 of 110,136 sites
5+
<1% · 528 of 246,751 sites
The share of the web's most authoritative domains, by Open Page Rank tier, seen running W3.CSS in recent crawls. Only 372 domains worldwide score 9 or higher.
Websites using W3.CSS
| # | Domain | Open Page RankOPR | Est. monthly visits (US)Visits (US) | Keywords | First seen |
|---|---|---|---|---|---|
| 1 | europa.eu | 9.57/10 | 42,200 | 31,835 | May 2023 |
| 2 | github.io | 9.43/10 | 1,800 | 1 | May 2023 |
| 3 | blogspot.com | 9.39/10 | - | - | May 2023 |
| 4 | weebly.com | 9.24/10 | 162,400 | 11,089 | May 2023 |
| 5 | mit.edu | 9.18/10 | 163,800 | 31,239 | May 2023 |
| 6 | oracle.com | 9.16/10 | 1,406,200 | 203,855 | May 2023 |
| 7 | nasa.gov | 9.15/10 | 2,697,400 | 289,920 | May 2023 |
| 8 | pages.dev | 9.14/10 | - | - | May 2023 |
| 9 | zendesk.com | 9.10/10 | 416,900 | 60,938 | May 2023 |
| 10 | canada.ca | 9.08/10 | 2,129,800 | 995,010 | May 2023 |
| 11 | noaa.gov | 9.07/10 | 1,233,000 | 125,205 | May 2023 |
| 12 | free.fr | 9.05/10 | 3,400 | 1,262 | May 2023 |
| 13 | b-cdn.net | 9.02/10 | - | - | Aug 2025 |
| 14 | netlify.app | 9.01/10 | 2 | 2 | May 2023 |
| 15 | texas.gov | 8.98/10 | 917,200 | 38,560 | Mar 2026 |
| 16 | cmu.edu | 8.97/10 | 436,800 | 81,774 | May 2024 |
| 17 | umn.edu | 8.96/10 | 78 | 51 | May 2023 |
| 18 | ethz.ch | 8.95/10 | 12,900 | 11,869 | Mar 2026 |
| 19 | w3schools.com | 8.91/10 | 4,173,900 | 935,770 | Aug 2026 |
| 20 | jimdofree.com | 8.88/10 | - | - | May 2023 |
| 21 | azurewebsites.net | 8.87/10 | - | - | Jul 2023 |
| 22 | appspot.com | 8.87/10 | - | - | May 2023 |
| 23 | dw.com | 8.83/10 | 482,700 | 286,700 | May 2023 |
| 24 | illinois.edu | 8.83/10 | 47,000 | 3,612 | Jun 2024 |
| 25 | it.com | 8.81/10 | - | - | Dec 2025 |
| 26 | utoronto.ca | 8.81/10 | 42,800 | 10,094 | May 2023 |
| 27 | mn.gov | 8.78/10 | 964,900 | 239,950 | Jun 2024 |
| 28 | msu.edu | 8.78/10 | 149,500 | 2,186 | May 2023 |
| 29 | gouv.qc.ca | 8.77/10 | - | - | May 2023 |
| 30 | web.app | 8.76/10 | - | - | May 2023 |
| 31 | uci.edu | 8.76/10 | 94,600 | 9,503 | Jun 2023 |
| 32 | cern.ch | 8.76/10 | 950 | 261 | May 2023 |
| 33 | army.mil | 8.75/10 | 1,036,400 | 233,760 | May 2023 |
| 34 | rutgers.edu | 8.75/10 | 146,600 | 28,567 | May 2023 |
| 35 | herokuapp.com | 8.74/10 | - | - | May 2023 |
| 36 | ucl.ac.uk | 8.74/10 | 154,800 | 93,062 | May 2023 |
| 37 | telekom.de | 8.73/10 | 3,400 | 4,133 | May 2023 |
| 38 | uwaterloo.ca | 8.71/10 | 224,700 | 71,840 | Jun 2023 |
| 39 | ucsb.edu | 8.71/10 | 73,800 | 11,445 | Jul 2023 |
| 40 | hku.hk | 8.70/10 | 6,000 | 1,100 | May 2023 |
| 41 | gatech.edu | 8.68/10 | 128,100 | 22,038 | May 2023 |
| 42 | navy.mil | 8.68/10 | 320,800 | 44,371 | May 2023 |
| 43 | delaware.gov | 8.67/10 | 128,700 | 12,173 | May 2023 |
| 44 | dc.gov | 8.67/10 | 99,400 | 10,148 | May 2023 |
| 45 | altervista.org | 8.66/10 | - | - | May 2023 |
| 46 | mlb.com | 8.65/10 | 38,868,700 | 1,257,348 | Mar 2024 |
| 47 | nus.edu.sg | 8.62/10 | 20,200 | 3,936 | May 2023 |
| 48 | ub.edu | 8.62/10 | 11,300 | 24,177 | Jul 2023 |
| 49 | colostate.edu | 8.62/10 | 189,100 | 10,871 | Jun 2024 |
| 50 | workers.dev | 8.61/10 | - | - | Oct 2024 |
| 51 | ups.com | 8.60/10 | 10,845,000 | 224,139 | Oct 2024 |
| 52 | ucm.es | 8.60/10 | 15,000 | 16,497 | Jun 2026 |
| 53 | developpement-durable.gouv.fr | 8.60/10 | - | - | Apr 2024 |
| 54 | unece.org | 8.59/10 | 56,000 | 23,579 | May 2023 |
| 55 | krakow.pl | 8.59/10 | 690 | 649 | May 2023 |
| 56 | salesforce-sites.com | 8.58/10 | - | - | May 2023 |
| 57 | tvp.pl | 8.58/10 | 1,500 | 1,073 | Jul 2024 |
| 58 | fu-berlin.de | 8.58/10 | 11,500 | 7,748 | Apr 2025 |
| 59 | nd.gov | 8.58/10 | 111,100 | 14,772 | May 2023 |
| 60 | unam.mx | 8.58/10 | 1,900 | 1,196 | May 2023 |
| 61 | neocities.org | 8.57/10 | 22,900 | 5,318 | May 2023 |
| 62 | byu.edu | 8.57/10 | 71,300 | 6,541 | May 2023 |
| 63 | cnr.it | 8.57/10 | 810 | 1,174 | May 2023 |
| 64 | wisconsin.gov | 8.57/10 | 127,800 | 1,821 | Aug 2025 |
| 65 | ucsc.edu | 8.56/10 | 72,800 | 11,228 | May 2023 |
| 66 | gmu.edu | 8.56/10 | 143,200 | 25,328 | May 2023 |
| 67 | udel.edu | 8.55/10 | 157,300 | 39,674 | Sep 2023 |
| 68 | spb.ru | 8.53/10 | - | - | May 2023 |
| 69 | tu-dresden.de | 8.49/10 | 2,300 | 3,199 | May 2023 |
| 70 | sapo.pt | 8.49/10 | 10,100 | 29,601 | Dec 2025 |
| 71 | pressreader.com | 8.48/10 | 63,400 | 122,960 | May 2023 |
| 72 | polimi.it | 8.38/10 | 5,800 | 4,283 | Jun 2026 |
| 73 | uni-freiburg.de | 8.37/10 | 4,000 | 1,793 | May 2023 |
| 74 | dyndns.org | 8.36/10 | - | - | May 2023 |
| 75 | wroc.pl | 8.36/10 | - | - | May 2023 |
| 76 | unimi.it | 8.35/10 | 3,300 | 3,182 | May 2023 |
| 77 | ruhr-uni-bochum.de | 8.34/10 | 5,500 | 3,577 | Jun 2026 |
| 78 | unicamp.br | 8.34/10 | 860 | 1,061 | Sep 2024 |
| 79 | tistory.com | 8.33/10 | 230 | 8 | May 2023 |
| 80 | istat.it | 8.33/10 | 2,000 | 1,933 | May 2023 |
| 81 | state.or.us | 8.32/10 | - | - | May 2023 |
| 82 | ifrs.org | 8.32/10 | 42,300 | 12,504 | May 2023 |
| 83 | huji.ac.il | 8.32/10 | - | 10 | May 2023 |
| 84 | cafe24.com | 8.31/10 | 6 | 6 | May 2023 |
| 85 | libguides.com | 8.31/10 | - | - | May 2023 |
| 86 | thueringen.de | 8.30/10 | 82 | 184 | May 2023 |
| 87 | cuhk.edu.hk | 8.29/10 | 5,100 | 1,878 | May 2023 |
| 88 | firebaseapp.com | 8.27/10 | - | - | May 2023 |
| 89 | ua.es | 8.27/10 | 130 | 216 | Jul 2025 |
| 90 | yolasite.com | 8.26/10 | - | - | Nov 2025 |
| 91 | lansstyrelsen.se | 8.25/10 | 1,800 | 885 | Dec 2023 |
| 92 | ufrj.br | 8.25/10 | 320 | 114 | May 2023 |
| 93 | uj.edu.pl | 8.24/10 | 360 | 132 | May 2023 |
| 94 | camh.ca | 8.22/10 | 111,300 | 28,720 | Dec 2023 |
| 95 | upf.edu | 8.22/10 | 4,700 | 3,555 | Sep 2026 |
| 96 | madrid.es | 8.22/10 | 5,200 | 11,494 | Aug 2023 |
| 97 | usal.es | 8.22/10 | 3,200 | 1,130 | May 2023 |
| 98 | nmsu.edu | 8.21/10 | 33,000 | 10,185 | May 2023 |
| 99 | lavozdegalicia.es | 8.20/10 | 5,100 | 22,738 | Aug 2023 |
| 100 | rub.de | 8.19/10 | - | - | Jul 2026 |
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) →
Columns: domain, Open Page Rank, first seen, last seen, industry (from the site's own structured data, blank when none).
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