What powers gjn.cz?
Last seen Jun 2026 · 24 technologies across 14 categories
CMS
Databases
MySQL
since Jan 2019
Editors
Font scripts
JavaScript frameworks
JavaScript libraries
Lightbox
since Jan 2019
Miscellaneous
RSS
since Dec 2022
Programming languages
Rich text editors
UI frameworks
Video players
VideoJS
since Nov 2023
Web frameworks
Web servers
Nginx
since Aug 2018
WordPress plugins
Audience
- 75% phone
- 25% desktop
Czechia
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
3.91 / 10 · ranked #641,817 of all domains
34 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.3 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 700 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Language: Czech
- Weight: 0.8 MB · 32 requests
- Structured data: Microdata
Homepage as crawled by the HTTP Archive, Jul 2026.
Subdomains
| Host | Techs |
|---|---|
| www.gjn.cz | 11 |
| knihovna.gjn.cz | 10 |
| physique-chimie.gjn.cz | 7 |
| znamky.gjn.cz | 4 |
| chemie.gjn.cz | 2 |
| elektross.gjn.cz | 2 |
Full technology history →
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Recent changes
- dropped cdnjs Oct 2025
- dropped Cloudflare Oct 2025
- dropped Font Awesome Oct 2025