What powers onlineschool.cz?
Last seen Jun 2026 · 18 technologies across 13 categories
A/B Testing
Analytics
Google Analytics
since Jan 2019
Authentication
Facebook Login
since Jul 2021
CDN
jsDelivr
since Jun 2023
CMS
WordPress
since Jan 2019
Databases
MySQL
since Jan 2019
Font scripts
Google Font API
since Jan 2019
JavaScript libraries
Lightbox
since Jan 2019
lite-youtube-embed
since Jun 2023
Miscellaneous
Open Graph
since Sep 2022
RSS
since Dec 2022
Programming languages
PHP
since Jan 2019
Security
HSTS
since Sep 2022
Video players
YouTube
since Jan 2019
Web servers
Apache Traffic Server
since Sep 2021
Audience
- 56% desktop
- 44% phone
Czechia
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
1.74 / 10 · ranked #4,727,054 of all domains
7 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.5 s |
| INP | 50 ms |
| CLS | 0.05 |
| TTFB | 800 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Language: Czech
- Weight: 0.7 MB · 48 requests
- Structured data: OpenGraph
Homepage as crawled by the HTTP Archive, Jul 2026.