Websites Powered by Prefix-Free
28,351 websites tracked using Prefix-Free (Miscellaneous) · leaverou.github.io
Prefix-Free is a web technology detected on the site. Its official site is leaverou.github.io. PoweredBy tracks the websites that use Prefix-Free across the public web; the tracked counts, adoption trend, and site list on this page are updated from our ongoing crawl of the miscellaneous ecosystem.
Usage trend
5K
10K
15K
Apr 2018
Jun 2020
Jul 2022
Sep 2024
Oct 2026
Domains observed using Prefix-Free in each month's HTTP Archive crawl,
Apr 2018 to Oct 2026 · peak 13,424 in Nov 2022. 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 9,503 Prefix-Free sites with Chrome UX data, p75 values, Sep 2026.
Top countries
United States
2,095
Japan
1,744
India
1,142
Germany
1,030
United Kingdom
893
South Korea
885
Canada
841
France
814
Sites using Prefix-Free by audience country, Chrome UX Report.
Usage by industry
| Industry | Share | Websites |
|---|---|---|
| Government | 0.12% | 11 |
| Industrial and manufacturing | 0.06% | 3 |
| Education | 0.05% | 33 |
| Blogs and publishing | 0.04% | 13 |
| Finance and insurance | 0.04% | 9 |
| Non-profit and religious | 0.04% | 4 |
| Arts and entertainment | 0.04% | 19 |
| Travel and hospitality | 0.04% | 31 |
| Pets and animals | 0.03% | 1 |
| Home and construction | 0.03% | 18 |
| Legal | 0.03% | 8 |
| Beauty and wellness | 0.03% | 8 |
Share of each industry's websites with a detected stack that use Prefix-Free; industries come from what sites declare in their own structured data.
Top sites by authority
9+
3% · 10 of 372 sites
8+
<1% · 57 of 7,677 sites
7+
<1% · 136 of 45,712 sites
6+
<1% · 220 of 110,136 sites
5+
<1% · 313 of 246,751 sites
The share of the web's most authoritative domains, by Open Page Rank tier, seen running Prefix-Free in recent crawls. Only 372 domains worldwide score 9 or higher.
Websites using Prefix-Free
| # | Domain | Open Page RankOPR | Est. monthly visits (US)Visits (US) | Keywords | First seen |
|---|---|---|---|---|---|
| 1 | github.io | 9.43/10 | 1,800 | 1 | Aug 2018 |
| 2 | blogspot.com | 9.39/10 | - | - | Aug 2018 |
| 3 | baidu.com | 9.33/10 | 27,100 | 321 | Feb 2020 |
| 4 | tumblr.com | 9.27/10 | 5,070,300 | 1,588,775 | Jun 2018 |
| 5 | nasa.gov | 9.15/10 | 2,697,400 | 289,920 | Aug 2018 |
| 6 | zendesk.com | 9.10/10 | 416,900 | 60,938 | Aug 2018 |
| 7 | cornell.edu | 9.10/10 | 140,600 | 19,190 | May 2025 |
| 8 | acm.org | 9.05/10 | 24,100 | 17,765 | Aug 2022 |
| 9 | vercel.app | 9.05/10 | - | - | Aug 2022 |
| 10 | uk.com | 9.00/10 | 2 | 12 | Sep 2019 |
| 11 | mynavi.jp | 8.95/10 | 81 | 14 | Sep 2020 |
| 12 | uchicago.edu | 8.92/10 | 63,700 | 10,331 | Feb 2019 |
| 13 | shop-pro.jp | 8.91/10 | 17 | 9 | Dec 2021 |
| 14 | azurewebsites.net | 8.87/10 | - | - | Jan 2019 |
| 15 | cam.ac.uk | 8.87/10 | 208,200 | 35,354 | Feb 2026 |
| 16 | fc2.com | 8.80/10 | 5,100 | 10 | Nov 2022 |
| 17 | in.gov | 8.80/10 | 3,047,100 | 832,670 | Aug 2018 |
| 18 | gouv.qc.ca | 8.77/10 | - | - | Dec 2020 |
| 19 | mcgill.ca | 8.70/10 | 403,000 | 145,097 | Aug 2026 |
| 20 | inria.fr | 8.68/10 | 1,200 | 667 | Jun 2021 |
| 21 | gatech.edu | 8.68/10 | 128,100 | 22,038 | Sep 2026 |
| 22 | pantheonsite.io | 8.67/10 | 7 | 5 | Jun 2024 |
| 23 | altervista.org | 8.66/10 | - | - | Dec 2020 |
| 24 | ru.com | 8.65/10 | - | - | Dec 2019 |
| 25 | vt.edu | 8.64/10 | 215,100 | 20,548 | Apr 2019 |
| 26 | buffalo.edu | 8.62/10 | 706,900 | 85,125 | Sep 2022 |
| 27 | sc.gov | 8.59/10 | 126,100 | 20,150 | Jan 2021 |
| 28 | salesforce-sites.com | 8.58/10 | - | - | Apr 2023 |
| 29 | rice.edu | 8.56/10 | 255,400 | 12,718 | Jan 2019 |
| 30 | uni-muenchen.de | 8.56/10 | - | - | Jul 2022 |
| 31 | sc.edu | 8.55/10 | 546,100 | 112,794 | Jun 2018 |
| 32 | spb.ru | 8.53/10 | - | - | Apr 2019 |
| 33 | eu.org | 8.51/10 | - | - | Sep 2020 |
| 34 | pp.ua | 8.37/10 | 22 | 5 | Jun 2018 |
| 35 | uqam.ca | 8.36/10 | 1,100 | 355 | Jun 2019 |
| 36 | org.ru | 8.35/10 | - | - | Jan 2019 |
| 37 | tistory.com | 8.33/10 | 230 | 8 | Aug 2018 |
| 38 | cafe24.com | 8.31/10 | 6 | 6 | Jun 2020 |
| 39 | eset.com | 8.31/10 | 67,600 | 18,838 | Aug 2022 |
| 40 | aaas.org | 8.30/10 | 89,200 | 21,174 | Aug 2018 |
| 41 | concordia.ca | 8.29/10 | 44,000 | 27,103 | Aug 2018 |
| 42 | stuttgart.de | 8.28/10 | 6,500 | 2,016 | Oct 2021 |
| 43 | firebaseapp.com | 8.27/10 | - | - | Aug 2018 |
| 44 | charite.de | 8.26/10 | 600 | 676 | Aug 2022 |
| 45 | novascotia.ca | 8.25/10 | 22,700 | 24,976 | Aug 2018 |
| 46 | gda.pl | 8.24/10 | - | - | Apr 2019 |
| 47 | camh.ca | 8.22/10 | 111,300 | 28,720 | Sep 2022 |
| 48 | wpcomstaging.com | 8.20/10 | - | - | Aug 2026 |
| 49 | unl.pt | 8.19/10 | 480 | 245 | Aug 2023 |
| 50 | qub.ac.uk | 8.15/10 | 21,300 | 13,550 | Nov 2021 |
| 51 | xerox.com | 8.07/10 | 59,100 | 13,691 | Aug 2018 |
| 52 | uwyo.edu | 8.06/10 | 195,800 | 50,087 | Apr 2020 |
| 53 | hyogo.lg.jp | 8.06/10 | - | - | Apr 2025 |
| 54 | cq.gov.cn | 8.02/10 | - | 7 | Jul 2024 |
| 55 | bg.ac.rs | 8.02/10 | 68 | 28 | Aug 2018 |
| 56 | rajasthan.gov.in | 8.01/10 | 3,100 | 236 | Aug 2023 |
| 57 | liverpool.ac.uk | 8.01/10 | 20,200 | 13,785 | Jul 2022 |
| 58 | ddns.net | 7.98/10 | - | - | Mar 2020 |
| 59 | maharashtra.gov.in | 7.92/10 | 15 | 54 | Aug 2018 |
| 60 | hani.co.kr | 7.92/10 | 1,600 | 1,002 | Sep 2022 |
| 61 | nihon-u.ac.jp | 7.92/10 | 550 | 67 | Aug 2019 |
| 62 | kaist.ac.kr | 7.91/10 | 4,900 | 1,443 | Aug 2018 |
| 63 | mofa.go.kr | 7.90/10 | 93,600 | 4,781 | Jan 2022 |
| 64 | grandest.fr | 7.90/10 | 250 | 263 | May 2022 |
| 65 | visitkorea.or.kr | 7.89/10 | 11 | 4 | May 2023 |
| 66 | babson.edu | 7.81/10 | 41,700 | 15,769 | Jul 2025 |
| 67 | difesa.it | 7.80/10 | 360 | 646 | Aug 2018 |
| 68 | gst.gov.in | 7.72/10 | 7,500 | 162 | Aug 2022 |
| 69 | state.wy.us | 7.72/10 | - | - | Jul 2022 |
| 70 | telangana.gov.in | 7.72/10 | 1,600 | 468 | Apr 2020 |
| 71 | bihar.gov.in | 7.69/10 | - | - | Oct 2025 |
| 72 | lionsclubs.org | 7.66/10 | 55,900 | 32,533 | Feb 2023 |
| 73 | ucoz.com | 7.66/10 | 500 | 39 | Mar 2020 |
| 74 | spip.net | 7.65/10 | 10 | 25 | Aug 2022 |
| 75 | darktrace.com | 7.59/10 | 11,400 | 7,354 | Jun 2018 |
| 76 | staradvertiser.com | 7.59/10 | 57,700 | 53,823 | Sep 2018 |
| 77 | uwinnipeg.ca | 7.57/10 | 5,600 | 4,493 | Apr 2022 |
| 78 | itu.edu.tr | 7.57/10 | 40 | 90 | Aug 2018 |
| 79 | ekomi.de | 7.55/10 | 3 | 31 | Jun 2018 |
| 80 | vrr.de | 7.55/10 | 380 | 610 | Aug 2018 |
| 81 | mendelu.cz | 7.53/10 | 140 | 96 | Jun 2018 |
| 82 | ipb.ac.id | 7.53/10 | 6,900 | 4,130 | Aug 2026 |
| 83 | molit.go.kr | 7.48/10 | 32 | 80 | Aug 2018 |
| 84 | hacettepe.edu.tr | 7.47/10 | 390 | 72 | Nov 2021 |
| 85 | live365.com | 7.46/10 | 54,500 | 30,286 | Oct 2023 |
| 86 | wb.gov.in | 7.46/10 | 5,300 | 3,311 | Feb 2026 |
| 87 | postech.ac.kr | 7.46/10 | 720 | 52 | Feb 2026 |
| 88 | skku.edu | 7.46/10 | 1,100 | 1,079 | Feb 2020 |
| 89 | ufpa.br | 7.46/10 | 140 | 228 | Aug 2022 |
| 90 | jakarta.go.id | 7.44/10 | 240 | 52 | Sep 2020 |
| 91 | senado.gob.mx | 7.43/10 | 340 | 227 | Jun 2021 |
| 92 | aegean.gr | 7.43/10 | 3 | 26 | May 2023 |
| 93 | trentu.ca | 7.43/10 | 38,800 | 14,671 | Sep 2023 |
| 94 | cyber.go.kr | 7.40/10 | - | - | Sep 2024 |
| 95 | airc.it | 7.38/10 | 220 | 444 | Feb 2020 |
| 96 | hanyang.ac.kr | 7.37/10 | 26,600 | 858 | Oct 2023 |
| 97 | nipponsteel.com | 7.36/10 | 29,500 | 1,801 | Jul 2019 |
| 98 | swissmadesoftware.org | 7.35/10 | 58 | 129 | Feb 2019 |
| 99 | loyno.edu | 7.35/10 | 35,500 | 10,451 | Mar 2023 |
| 100 | cra.org | 7.33/10 | 2,400 | 1,591 | Jun 2018 |
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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