What powers coolenglish.co.kr?
Last seen Jun 2026 · 9 technologies across 6 categories
CDN
JavaScript libraries
Miscellaneous
Open Graph
since Sep 2022
Programming languages
PHP
since Sep 2021
Security
HSTS
since Apr 2024
Web servers
Apache HTTP Server
since Mar 2021
Audience
- 39% tablet
- 38% desktop
- 23% phone
South Korea
Countries where the site has Chrome traffic, strongest markets first.
Core Web Vitals
| LCP | 0.6 s |
| INP | 75 ms |
| CLS | 0 |
| TTFB | 100 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Language: Korean
- Weight: 1.3 MB · 57 requests
Homepage as crawled by the HTTP Archive, Jul 2026.
Subdomains
| Host | Techs |
|---|---|
| www.coolenglish.co.kr | 9 |
| coolenglish.co.kr | 8 |