What powers jcl.cz?
Last seen Jun 2026 · 45 technologies across 22 categories
Advertising
Microsoft Advertising
since Feb 2025
Analytics
Google Analytics
since Jun 2018
Microsoft Clarity
since Apr 2026
Caching
RackCache
since Oct 2025
CDN
jsDelivr
since May 2024
CMS
Databases
MySQL
since Apr 2026
Google Workspace
since Aug 2022
Mailgun
since Aug 2022
Font scripts
Font Awesome
since Apr 2026
Google Font API
since May 2024
JavaScript graphics
particles.js
since Apr 2026
JavaScript libraries
Miscellaneous
Open Graph
since Sep 2022
RSS
since Apr 2026
Operating Systems
CentOS
since Aug 2018
Performance
LazySizes
since Feb 2022
Priority Hints
since Apr 2026
Programming languages
Security
Cloudflare Turnstile
since Jun 2026
reCAPTCHA
since Apr 2026
Tag managers
Google Tag Manager
since Feb 2019
UI frameworks
Bootstrap
since Apr 2026
Web frameworks
Ruby on Rails
since Oct 2025
Web Server Extensions
Web Servers
Apache HTTP Server
since Apr 2018
WordPress plugins
Elementor Header & Footer Builder
since Apr 2026
Essential Addons for Elementor
since Apr 2026
EWWW Image Optimizer
since Apr 2026
Polylang
since Apr 2026
Smash Balloon Instagram Feed
since Apr 2026
WordPress themes
Audience
Czechia
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
3.19 / 10 · ranked #1,278,728 of all domains
17 referring domains · OpenPageRank
Core Web Vitals
| LCP | 0.6 s |
| INP | 25 ms |
| CLS | 0 |
| TTFB | 300 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Language: Czech (Czechia)
- CDN: Google
- Weight: 6.5 MB · 180 requests
- WordPress theme: futurio · all themes
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Jul 2026.
Subdomains
| Host | Techs |
|---|---|
| jcl.cz | 38 |
| langtest.jcl.cz | 8 |
| cport.jcl.cz | 7 |
| www.jcl.cz | 5 |
Full technology history →
Report an incorrect detection
Recent changes
- dropped cdnjs Jun 2026
- dropped Cloudflare Jun 2026
- dropped Cloudflare Bot Management Jun 2026
- dropped LazySizes unveilhooks plugin Jun 2026
- dropped MyFonts Jun 2026
- dropped PWA Jun 2026
- dropped scrollreveal Jun 2026
- dropped Tippy.js Jun 2026
- dropped Unpkg Jun 2026
- detected Bootstrap Apr 2026
- detected core-js Apr 2026
- detected Elementor Apr 2026
- detected Elementor Header & Footer Builder Apr 2026
- detected Essential Addons for Elementor Apr 2026
- detected EWWW Image Optimizer Apr 2026
- detected Font Awesome Apr 2026
- detected Futurio Apr 2026
- detected jQuery Migrate Apr 2026
- detected Microsoft Clarity Apr 2026
- detected MySQL Apr 2026
- detected particles.js Apr 2026
- detected Polylang Apr 2026
- detected Priority Hints Apr 2026
- detected reCAPTCHA Apr 2026
- detected RSS Apr 2026
- detected Site Kit Apr 2026
- detected Slick Apr 2026
- detected Smash Balloon Instagram Feed Apr 2026
- detected Swiper Apr 2026
- detected Underscore.js Apr 2026
- detected WordPress Apr 2026
- detected WPForms Apr 2026
- detected Yoast SEO Apr 2026
- dropped core-js Nov 2025
- dropped Facebook Pixel Nov 2025
- dropped Hotjar Nov 2025
- dropped OptiMonk Nov 2025
- detected Google Font API Oct 2025