Websites Powered by Closure Library
93,460 websites tracked using Closure Library (JavaScript libraries) · github.com
Closure Library is a JavaScript library used to add functionality to web pages. Its official site is github.com. PoweredBy tracks the websites that use Closure Library 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
10K
20K
30K
40K
Oct 2023
Jul 2024
Apr 2025
Jan 2026
Oct 2026
Domains observed using Closure Library in each month's HTTP Archive crawl,
Oct 2023 to Oct 2026 · peak 38,216 in Nov 2023. The tracked total above also
counts sites not re-crawled recently.
Core Web Vitals
LCP 2 s
INP 75 ms
CLS 0
TTFB 800 ms
Median site among 33,322 Closure Library sites with Chrome UX data, p75 values, Sep 2026.
Top countries
United States
7,941
India
5,225
Brazil
3,364
Japan
3,359
United Kingdom
2,878
Spain
2,862
Indonesia
2,771
France
2,650
Sites using Closure Library by audience country, Chrome UX Report.
Usage by industry
| Industry | Share | Websites |
|---|---|---|
| News and media | 2.08% | 1,025 |
| Blogs and publishing | 0.87% | 252 |
| Education | 0.33% | 205 |
| Government | 0.15% | 14 |
| Arts and entertainment | 0.15% | 76 |
| Non-profit and religious | 0.11% | 11 |
| Games | 0.08% | 6 |
| Sports and fitness | 0.08% | 17 |
| Finance and insurance | 0.07% | 15 |
| Professional services | 0.07% | 39 |
| Pets and animals | 0.06% | 2 |
| Software and apps | 0.06% | 95 |
Share of each industry's websites with a detected stack that use Closure Library; industries come from what sites declare in their own structured data.
Top sites by authority
9+
6% · 22 of 372 sites
8+
3% · 207 of 7,677 sites
7+
1% · 566 of 45,712 sites
6+
<1% · 817 of 110,136 sites
5+
<1% · 1,200 of 246,751 sites
The share of the web's most authoritative domains, by Open Page Rank tier, seen running Closure Library in recent crawls. Only 372 domains worldwide score 9 or higher.
Websites using Closure Library
| # | Domain | Open Page RankOPR | Est. monthly visits (US)Visits (US) | Keywords | First seen |
|---|---|---|---|---|---|
| 1 | google.com | 10.00/10 | 36,639,600 | 1,268,226 | Oct 2023 |
| 2 | nih.gov | 9.44/10 | 298,300 | 34,546 | Jul 2026 |
| 3 | github.io | 9.43/10 | 1,800 | 1 | Oct 2023 |
| 4 | blogspot.com | 9.39/10 | - | - | Oct 2023 |
| 5 | google.de | 9.33/10 | 2,500 | 1,057 | Oct 2023 |
| 6 | harvard.edu | 9.24/10 | 472,700 | 11,444 | Jan 2026 |
| 7 | stanford.edu | 9.19/10 | 3,302,700 | 5,160 | Oct 2023 |
| 8 | google.co.jp | 9.18/10 | 2,600 | 418 | Oct 2023 |
| 9 | mit.edu | 9.18/10 | 163,800 | 31,239 | Oct 2023 |
| 10 | pages.dev | 9.14/10 | - | - | Feb 2025 |
| 11 | hbr.org | 9.14/10 | 597,200 | 196,139 | Oct 2023 |
| 12 | berkeley.edu | 9.10/10 | 166,700 | 4,721 | Oct 2023 |
| 13 | google.fr | 9.07/10 | 7,300 | 539 | Oct 2023 |
| 14 | vercel.app | 9.05/10 | - | - | May 2024 |
| 15 | free.fr | 9.05/10 | 3,400 | 1,262 | Oct 2023 |
| 16 | cbc.ca | 9.03/10 | 1,276,900 | 807,604 | Feb 2026 |
| 17 | netlify.app | 9.01/10 | 2 | 2 | Oct 2023 |
| 18 | google.nl | 9.01/10 | 310 | 116 | Oct 2023 |
| 19 | google.es | 9.01/10 | 2,500 | 1,269 | Oct 2023 |
| 20 | umich.edu | 9.01/10 | 36,500 | 1,974 | Oct 2023 |
| 21 | uk.com | 9.00/10 | 2 | 12 | Oct 2023 |
| 22 | google.co.uk | 9.00/10 | 78,200 | 2,239 | Oct 2023 |
| 23 | netflix.com | 8.99/10 | 66,733,700 | 2,404,073 | Oct 2023 |
| 24 | google.it | 8.99/10 | 2,000 | 348 | Oct 2023 |
| 25 | cmu.edu | 8.97/10 | 436,800 | 81,774 | Oct 2023 |
| 26 | wisc.edu | 8.97/10 | 461,200 | 6,382 | Oct 2023 |
| 27 | google.ca | 8.96/10 | 7,500 | 2,795 | Oct 2023 |
| 28 | umn.edu | 8.96/10 | 78 | 51 | Oct 2023 |
| 29 | web.dev | 8.95/10 | 137,400 | 33,763 | Oct 2023 |
| 30 | ethz.ch | 8.95/10 | 12,900 | 11,869 | Nov 2023 |
| 31 | sakura.ne.jp | 8.95/10 | - | - | Oct 2023 |
| 32 | jhu.edu | 8.93/10 | 177,300 | 5,821 | Jun 2026 |
| 33 | uchicago.edu | 8.92/10 | 63,700 | 10,331 | Jan 2025 |
| 34 | withgoogle.com | 8.91/10 | - | - | Oct 2023 |
| 35 | usc.edu | 8.89/10 | 362,800 | 14,354 | Oct 2023 |
| 36 | azurewebsites.net | 8.87/10 | - | - | Oct 2023 |
| 37 | us.com | 8.86/10 | 32 | 8 | Oct 2023 |
| 38 | google.pl | 8.86/10 | 120 | 290 | Oct 2023 |
| 39 | purdue.edu | 8.86/10 | 746,900 | 132,133 | Oct 2023 |
| 40 | politico.eu | 8.85/10 | 177,300 | 83,364 | Oct 2023 |
| 41 | umd.edu | 8.85/10 | 253,200 | 15,103 | Feb 2026 |
| 42 | google.com.au | 8.85/10 | 2,400 | 776 | Oct 2023 |
| 43 | google.ch | 8.85/10 | 1,600 | 70 | Oct 2023 |
| 44 | livejournal.com | 8.84/10 | 7,200 | 712 | Oct 2023 |
| 45 | ucsd.edu | 8.84/10 | 48,100 | 2,261 | Oct 2023 |
| 46 | ubc.ca | 8.84/10 | 14,500 | 2,813 | Feb 2026 |
| 47 | illinois.edu | 8.83/10 | 47,000 | 3,612 | Jul 2026 |
| 48 | google.co.in | 8.81/10 | 4,600 | 2,496 | Oct 2023 |
| 49 | utoronto.ca | 8.81/10 | 42,800 | 10,094 | Apr 2026 |
| 50 | fc2.com | 8.80/10 | 5,100 | 10 | Oct 2023 |
| 51 | utah.gov | 8.80/10 | 129,700 | 22,115 | Jan 2026 |
| 52 | google.com.br | 8.79/10 | 98,400 | 1,398 | Oct 2023 |
| 53 | google.cz | 8.78/10 | 55 | 29 | Oct 2023 |
| 54 | georgetown.edu | 8.78/10 | 136,900 | 25,266 | Oct 2023 |
| 55 | chromium.org | 8.77/10 | 65,900 | 10,901 | Oct 2023 |
| 56 | gouv.qc.ca | 8.77/10 | - | - | Jan 2026 |
| 57 | web.app | 8.76/10 | - | - | Oct 2023 |
| 58 | uci.edu | 8.76/10 | 94,600 | 9,503 | Oct 2023 |
| 59 | google.se | 8.76/10 | 140 | 65 | Oct 2023 |
| 60 | google.at | 8.73/10 | 9 | 90 | Oct 2023 |
| 61 | brown.edu | 8.73/10 | 376,500 | 23,950 | Oct 2023 |
| 62 | u-tokyo.ac.jp | 8.71/10 | 25,200 | 7,795 | Oct 2023 |
| 63 | mcgill.ca | 8.70/10 | 403,000 | 145,097 | Apr 2026 |
| 64 | in.net | 8.69/10 | - | - | Oct 2023 |
| 65 | lbl.gov | 8.69/10 | 59,100 | 2,329 | Oct 2023 |
| 66 | google.com.sg | 8.68/10 | 1,700 | 215 | Oct 2023 |
| 67 | ky.gov | 8.68/10 | - | 1 | Oct 2023 |
| 68 | xsrv.jp | 8.68/10 | - | - | May 2024 |
| 69 | unimelb.edu.au | 8.68/10 | 16,100 | 7,502 | Sep 2026 |
| 70 | co.com | 8.67/10 | - | - | Aug 2026 |
| 71 | unicode.org | 8.66/10 | 36,100 | 12,566 | Oct 2023 |
| 72 | altervista.org | 8.66/10 | - | - | Oct 2023 |
| 73 | caltech.edu | 8.65/10 | 148,200 | 20,173 | Jan 2026 |
| 74 | uga.edu | 8.65/10 | 234,500 | 2,950 | Mar 2026 |
| 75 | usp.br | 8.65/10 | 1 | 19 | Oct 2023 |
| 76 | gitlab.io | 8.64/10 | - | - | Nov 2023 |
| 77 | google.be | 8.64/10 | 6 | 30 | Oct 2023 |
| 78 | iowa.gov | 8.64/10 | 68,600 | 15,174 | Oct 2023 |
| 79 | google.co.id | 8.63/10 | 790 | 189 | Oct 2023 |
| 80 | psychiatry.org | 8.62/10 | 564,200 | 103,074 | Dec 2023 |
| 81 | com.de | 8.62/10 | 5 | 14 | Oct 2023 |
| 82 | google.com.tw | 8.61/10 | 2 | 17 | Oct 2023 |
| 83 | google.com.tr | 8.58/10 | 110 | 281 | Oct 2023 |
| 84 | eater.com | 8.58/10 | 416,700 | 140,007 | Jun 2024 |
| 85 | unam.mx | 8.58/10 | 1,900 | 1,196 | Oct 2023 |
| 86 | neocities.org | 8.57/10 | 22,900 | 5,318 | Oct 2023 |
| 87 | kyoto-u.ac.jp | 8.57/10 | 4,800 | 3,548 | Oct 2023 |
| 88 | rice.edu | 8.56/10 | 255,400 | 12,718 | Oct 2023 |
| 89 | cuni.cz | 8.56/10 | 4,400 | 1,637 | Oct 2023 |
| 90 | google.dk | 8.55/10 | 1,600 | 21 | Oct 2023 |
| 91 | socialmediatoday.com | 8.54/10 | 28,300 | 41,285 | Oct 2023 |
| 92 | europapress.es | 8.54/10 | 9,400 | 23,833 | Nov 2025 |
| 93 | ga.gov | 8.53/10 | - | - | Oct 2023 |
| 94 | jp.net | 8.52/10 | 66 | 7 | Oct 2025 |
| 95 | itv.com | 8.52/10 | 235,900 | 148,784 | Oct 2023 |
| 96 | upm.es | 8.52/10 | 2,100 | 1,692 | Jan 2026 |
| 97 | keio.ac.jp | 8.52/10 | 9,400 | 1,068 | Oct 2023 |
| 98 | google.ru | 8.51/10 | 480 | 67 | Oct 2023 |
| 99 | eu.org | 8.51/10 | - | - | Oct 2023 |
| 100 | google.pt | 8.50/10 | 220 | 94 | Oct 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) →
Columns: domain, Open Page Rank, first seen, last seen, industry (from the site's own structured data, blank when none).
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