What powers mar21.eu?
Last seen Jun 2026 · 9 technologies across 8 categories
Caching
Varnish
since Jul 2020
CDN
Fastly
since Jul 2020
JavaScript libraries
PaaS
GitHub Pages
since Jul 2020
Netlify
since Mar 2023
Security
HSTS
since Mar 2023
UI frameworks
Semantic UI
since Jul 2020
Webmail
Proton Mail
since Jan 2023
Widgets
Ko-fi
since Jul 2021
Audience
- 66% desktop
- 34% phone
Czechia
Germany
Poland
Austria
Portugal
Hungary
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
0.49 / 10 · ranked #25,349,339 of all domains
1 referring domains · OpenPageRank
Core Web Vitals
| LCP | 0.6 s |
| INP | 75 ms |
| CLS | 0.05 |
| TTFB | 100 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Language: English
- CDN: Fastly
- Weight: 1.2 MB · 38 requests
Homepage as crawled by the HTTP Archive, Jul 2026.
Subdomains
| Host | Techs |
|---|---|
| sftools.mar21.eu | 7 |
| beta.sftools.mar21.eu | 6 |