What powers zsel.edu.pl?
Last seen Jun 2026 · 22 technologies across 10 categories
CDN
Font scripts
Google Font API
since Mar 2019
JavaScript libraries
Miscellaneous
Operating systems
Ubuntu
since Jun 2026
Programming languages
Security
reCAPTCHA
since Jan 2024
UI frameworks
Video players
Flowplayer
since Apr 2024
Web servers
Audience
- 84% phone
- 16% desktop
Poland
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
2.01 / 10 · ranked #3,568,522 of all domains
11 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.5 s |
| INP | 75 ms |
| CLS | 0 |
| TTFB | 600 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Language: Polish
- Weight: 37.2 MB · 227 requests
Homepage as crawled by the HTTP Archive, Jul 2026.
Subdomains
| Host | Techs |
|---|---|
| zsel.edu.pl | 13 |
| www.zsel.edu.pl | 9 |
| egzaminy.zsel.edu.pl | 6 |
| matematyka.zsel.edu.pl | 3 |
| archiwum.zsel.edu.pl | 2 |
| cad.zsel.edu.pl | 2 |
| www.cad.zsel.edu.pl | 2 |
| pracownia.zsel.edu.pl | 1 |