What powers cltk.cz?
Last seen Aug 2026 · 9 technologies across 7 categories
Font scripts
Google Font API
since Mar 2020
JavaScript libraries
Miscellaneous
HTTP/3
since Oct 2023
Open Graph
since Sep 2022
Security
HSTS
since Sep 2022
UI frameworks
Pure CSS
since Mar 2020
Web servers
Nginx
since Mar 2020
Webmail
Microsoft 365
since Sep 2025
AI Crawlers
Doesn't mention any of the 33 AI crawlers we track in its robots.txt; all are allowed by default. Checked Aug 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Audience
- 65% phone
- 35% desktop
Czechia
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
2.82 / 10 · ranked #1,940,623 of all domains
17 referring domains · OpenPageRank
Core Web Vitals
| LCP | 0.8 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 200 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: English
- Weight: 1.2 MB · 73 requests
- Structured data: JSON-LD, OpenGraph
Homepage as crawled by the HTTP Archive, Sep 2026.