Top-level domain · 30 sites
What are websites on .cz domains (Czechia) built with?
As of 2026-10-02, we read the home pages of 30 websites on .cz domains (Czechia) among our popular sample: the most used CMS is WordPress (17%), the most used framework is ASP.NET (6.7%) and the most used CDN or host is Cloudflare (17%).
Most used technologies
| Technology | Category | Sites | Share | vs all sites |
|---|---|---|---|---|
| Google Tag Manager | Tag manager | 18 | 60% | 1.4x |
| Nginx | Web server | 10 | 33% | 1.5x |
| jQuery | JavaScript library | 9 | 30% | 1.0x |
| PHP | Programming language | 8 | 27% | 1.2x |
| Google Fonts | Fonts | 7 | 23% | 1.3x |
| Google Analytics | Analytics | 6 | 20% | 0.9x |
| Cloudflare | CDN | 5 | 17% | 0.5x |
| WordPress | CMS | 5 | 17% | 1.1x |
| Envoy | Web server | 4 | 13% | 25.6x |
| Font Awesome | Fonts | 4 | 13% | 1.4x |
| jQuery Migrate | JavaScript library | 4 | 13% | 1.9x |
| jQuery UI | JavaScript library | 4 | 13% | 2.9x |
| reCAPTCHA | Security / bot protection | 4 | 13% | 2.4x |
| cdnjs | CDN | 3 | 10% | 1.2x |
| Contact Form 7 | WordPress plugin | 3 | 10% | 8.6x |
| Matomo | Analytics | 3 | 10% | 4.4x |
| Swiper | JavaScript library | 3 | 10% | 1.5x |
| unpkg | CDN | 3 | 10% | 3.8x |
| Apache HTTP Server | Web server | 2 | 6.7% | 0.8x |
| ASP.NET | Backend framework | 2 | 6.7% | 3.6x |
| Bootstrap | UI library | 2 | 6.7% | 0.7x |
| Cloudflare Web Analytics | Analytics | 2 | 6.7% | 0.5x |
| Facebook SDK | JavaScript library | 2 | 6.7% | 3.6x |
| Google AdSense | Advertising | 2 | 6.7% | 2.1x |
| Lightbox | JavaScript library | 2 | 6.7% | 16.9x |
"vs all sites" compares the share here with the share among all 7,859 sites: 2.0x means twice as common.
Over-represented here
Technologies much more common on websites on .cz domains (Czechia) than on average (at least 5 sites):
| Technology | Sites | Share | vs all sites |
|---|---|---|---|
| Nginx | 10 | 33% | 1.5x |
Most popular websites on .cz domains (Czechia)
- seznam.cz #322
- novinky.cz #662
- cukrarnauandela.cz #1,042
- idnes.cz #1,503
- wedos.cz #2,786
- cuni.cz #2,790
- forpsi.cz #2,994
- muni.cz #3,480
- centrum.cz #3,506
- cra.cz #3,698
- blesk.cz #4,037
- seznamzpravy.cz #4,176
- windguru.cz #4,201
- bazos.cz #4,769
- super.cz #4,851
- livesport.cz #4,924
- prehrajto.cz #5,472
- anikoto.cz #5,509
- idos.cz #5,623
- freevideo.cz #5,851
- thinline.cz #6,860
- master.cz #7,489
- web4u.cz #8,106
- ceskatelevize.cz #8,643
- 257.cz #8,862
- phoca.cz #9,017
- active24.cz #9,059
- regzone.cz #9,478
- ignum.cz #9,494
- iprima.cz #9,703
The number is the position in our popularity-ordered sample (1 = most popular).
FAQ
- What are websites on .cz domains (Czechia) built with?
- As of 2026-10-02, we read the home pages of 30 websites on .cz domains (Czechia) among our popular sample: the most used CMS is WordPress (17%), the most used framework is ASP.NET (6.7%) and the most used CDN or host is Cloudflare (17%).
- Which technologies are most common on websites on .cz domains (Czechia)?
- Google Tag Manager (60%), Nginx (33%), jQuery (30%), PHP (27%), Google Fonts (23%) and Google Analytics (20%) (share of the 30 sites analysed on 2026-10-02).
- What is typical for websites on .cz domains (Czechia) compared with all sites?
- Nginx (1.5x as common as on average).
- Does .cz mean the site is hosted in that country?
- No. A top-level domain says how the name is registered, not where the server is. The technologies are detected from the home page, wherever it is hosted.