Websites Powered by Prefix-Free
28,381 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
May 2020
May 2022
Jun 2024
Jun 2026
Domains observed using Prefix-Free in each month's HTTP Archive crawl,
Apr 2018 to Jun 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 9,979 Prefix-Free sites with Chrome UX data, p75 values, Jun 2026.
Top countries
United States
2,475
Japan
2,082
India
1,315
Germany
1,184
United Kingdom
1,041
South Korea
1,034
Canada
997
France
976
Sites using Prefix-Free by audience country, Chrome UX Report.
Top sites by authority
9+
3% · 11 of 372 sites
8+
<1% · 57 of 7,677 sites
7+
<1% · 137 of 45,712 sites
6+
<1% · 231 of 110,136 sites
5+
<1% · 326 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 | 357 | Feb 2020 |
| 4 | tumblr.com | 9.27/10 | 5,146,200 | 2,235,020 | Jun 2018 |
| 5 | nasa.gov | 9.15/10 | 2,715,500 | 372,280 | Aug 2018 |
| 6 | zendesk.com | 9.10/10 | 416,900 | 60,938 | Aug 2018 |
| 7 | cornell.edu | 9.10/10 | 242,100 | 23,854 | May 2025 |
| 8 | free.fr | 9.05/10 | 3,400 | 1,262 | Jul 2020 |
| 9 | readthedocs.io | 9.04/10 | - | - | Aug 2022 |
| 10 | netlify.app | 9.01/10 | 2 | 2 | May 2023 |
| 11 | uk.com | 9.00/10 | 2 | 12 | Sep 2019 |
| 12 | mynavi.jp | 8.95/10 | 81 | 14 | Sep 2020 |
| 13 | uchicago.edu | 8.92/10 | 63,700 | 10,331 | Feb 2019 |
| 14 | shop-pro.jp | 8.91/10 | 17 | 9 | Dec 2021 |
| 15 | azurewebsites.net | 8.87/10 | - | - | Jan 2019 |
| 16 | cam.ac.uk | 8.87/10 | 208,200 | 35,354 | Feb 2026 |
| 17 | in.gov | 8.80/10 | 3,076,000 | 1,001,546 | Aug 2018 |
| 18 | gouv.qc.ca | 8.77/10 | - | - | Dec 2020 |
| 19 | inria.fr | 8.68/10 | 1,200 | 667 | Jun 2021 |
| 20 | pantheonsite.io | 8.67/10 | 7 | 5 | Jun 2024 |
| 21 | altervista.org | 8.66/10 | - | - | Dec 2020 |
| 22 | ru.com | 8.65/10 | - | - | Dec 2019 |
| 23 | cuny.edu | 8.65/10 | 294,000 | 61,388 | Aug 2018 |
| 24 | vt.edu | 8.64/10 | 215,800 | 25,974 | Apr 2019 |
| 25 | sc.gov | 8.59/10 | 132,100 | 22,114 | Jan 2021 |
| 26 | salesforce-sites.com | 8.58/10 | - | - | Apr 2023 |
| 27 | rice.edu | 8.56/10 | 256,200 | 13,279 | Jan 2019 |
| 28 | uni-muenchen.de | 8.56/10 | - | - | Jul 2022 |
| 29 | sc.edu | 8.55/10 | 527,200 | 137,589 | Jun 2018 |
| 30 | spb.ru | 8.53/10 | - | - | Apr 2019 |
| 31 | eu.org | 8.51/10 | - | - | Sep 2020 |
| 32 | asus.com | 8.50/10 | 1,078,400 | 375,127 | Jun 2021 |
| 33 | pp.ua | 8.37/10 | 22 | 5 | Jun 2018 |
| 34 | uqam.ca | 8.36/10 | 1,100 | 355 | Jun 2019 |
| 35 | org.ru | 8.35/10 | - | - | Jan 2019 |
| 36 | uni-leipzig.de | 8.35/10 | 4,500 | 979 | Jan 2019 |
| 37 | tistory.com | 8.33/10 | 230 | 8 | Aug 2018 |
| 38 | cafe24.com | 8.31/10 | 6 | 6 | Jun 2020 |
| 39 | aaas.org | 8.30/10 | 89,200 | 21,174 | Aug 2018 |
| 40 | concordia.ca | 8.29/10 | 44,000 | 27,103 | Aug 2018 |
| 41 | stuttgart.de | 8.28/10 | 6,500 | 2,016 | Oct 2021 |
| 42 | firebaseapp.com | 8.27/10 | - | - | Aug 2018 |
| 43 | charite.de | 8.26/10 | 600 | 676 | Aug 2022 |
| 44 | novascotia.ca | 8.25/10 | 22,700 | 24,976 | Aug 2018 |
| 45 | ulisboa.pt | 8.25/10 | 6,100 | 1,009 | Jun 2023 |
| 46 | gda.pl | 8.24/10 | - | - | Apr 2019 |
| 47 | camh.ca | 8.22/10 | 111,300 | 28,720 | Sep 2022 |
| 48 | unl.pt | 8.19/10 | 480 | 245 | Aug 2023 |
| 49 | univ-lyon1.fr | 8.12/10 | 930 | 492 | Apr 2025 |
| 50 | xerox.com | 8.07/10 | 59,800 | 20,093 | Aug 2018 |
| 51 | uwyo.edu | 8.06/10 | 197,500 | 63,385 | Apr 2020 |
| 52 | hyogo.lg.jp | 8.06/10 | - | - | Apr 2025 |
| 53 | cq.gov.cn | 8.02/10 | - | 7 | Jul 2024 |
| 54 | co.ua | 8.02/10 | - | - | Jan 2019 |
| 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 | gia.edu | 7.96/10 | 710,500 | 58,386 | Aug 2018 |
| 59 | ticaret.gov.tr | 7.94/10 | 570 | 875 | Dec 2020 |
| 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 | sch.gr | 7.84/10 | 12 | 33 | Dec 2025 |
| 67 | babson.edu | 7.81/10 | 42,100 | 19,897 | Jul 2025 |
| 68 | difesa.it | 7.80/10 | 360 | 646 | Aug 2018 |
| 69 | gst.gov.in | 7.72/10 | 7,500 | 162 | Aug 2022 |
| 70 | state.wy.us | 7.72/10 | - | - | Jul 2022 |
| 71 | telangana.gov.in | 7.72/10 | 1,600 | 468 | Apr 2020 |
| 72 | bihar.gov.in | 7.69/10 | - | - | Oct 2025 |
| 73 | ucoz.com | 7.66/10 | 500 | 39 | Mar 2020 |
| 74 | darktrace.com | 7.59/10 | 11,400 | 7,354 | Jun 2018 |
| 75 | staradvertiser.com | 7.59/10 | 58,300 | 64,525 | Sep 2018 |
| 76 | itu.edu.tr | 7.57/10 | 40 | 90 | Aug 2018 |
| 77 | ekomi.de | 7.55/10 | 3 | 31 | Jun 2018 |
| 78 | vrr.de | 7.55/10 | 380 | 610 | Aug 2018 |
| 79 | mendelu.cz | 7.53/10 | 140 | 96 | Jun 2018 |
| 80 | molit.go.kr | 7.48/10 | 32 | 80 | Aug 2018 |
| 81 | imgw.pl | 7.47/10 | 270 | 211 | Aug 2018 |
| 82 | live365.com | 7.46/10 | 55,300 | 33,690 | Oct 2023 |
| 83 | wb.gov.in | 7.46/10 | 5,300 | 3,311 | Feb 2026 |
| 84 | postech.ac.kr | 7.46/10 | 720 | 52 | Feb 2026 |
| 85 | skku.edu | 7.46/10 | 1,100 | 1,079 | Feb 2020 |
| 86 | ufpa.br | 7.46/10 | 140 | 228 | Aug 2022 |
| 87 | istanbul.edu.tr | 7.45/10 | 1,100 | 66 | Oct 2020 |
| 88 | davidson.edu | 7.45/10 | 35,700 | 20,308 | May 2022 |
| 89 | jakarta.go.id | 7.44/10 | 240 | 52 | Sep 2020 |
| 90 | senado.gob.mx | 7.43/10 | 340 | 227 | Jun 2021 |
| 91 | aegean.gr | 7.43/10 | 3 | 26 | May 2023 |
| 92 | trentu.ca | 7.43/10 | 38,800 | 14,671 | Sep 2023 |
| 93 | bsl.nl | 7.38/10 | - | 22 | Jun 2026 |
| 94 | airc.it | 7.38/10 | 220 | 444 | Feb 2020 |
| 95 | hanyang.ac.kr | 7.37/10 | 26,600 | 858 | Oct 2023 |
| 96 | depauw.edu | 7.37/10 | 29,000 | 11,149 | Aug 2022 |
| 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 | 35,300 | 12,269 | Mar 2023 |
| 100 | cra.org | 7.33/10 | 2,600 | 2,004 | 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) →
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