What powers optimist-international-school.nl?
Last seen Jun 2026 · 25 technologies across 17 categories
Advertising
Microsoft Advertising
since Jun 2025
Analytics
Google Analytics
since Jul 2019
Microsoft Clarity
since Sep 2023
CMS
WordPress
since Mar 2020
Databases
MySQL
since Mar 2020
Font scripts
Google Font API
since Jul 2019
Twitter Emoji (Twemoji)
since Mar 2020
JavaScript frameworks
React
since Jun 2022
JavaScript libraries
Miscellaneous
Operating systems
AlmaLinux
since May 2025
Programming languages
Security
HSTS
since Sep 2022
SEO
Tag managers
Google Tag Manager
since Mar 2020
Video players
YouTube
since Mar 2026
Web server extensions
Web servers
WordPress plugins
Audience
- 52% phone
- 48% desktop
Netherlands
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
2.62 / 10 · ranked #2,295,218 of all domains
14 referring domains · OpenPageRank
Core Web Vitals
| LCP | 3 s |
| INP | 100 ms |
| CLS | 0.15 |
| TTFB | 2300 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Language: English (United States)
- Weight: 10.5 MB · 126 requests
- WordPress theme: roots · all themes
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Jul 2026.
Full technology history →
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Recent changes
- dropped Bootstrap Apr 2026
- dropped jQuery Apr 2026
- dropped jQuery Migrate Apr 2026
- dropped LazySizes Apr 2026
- dropped Popper Apr 2026
- detected Swiper Mar 2026
- detected Twitter Emoji (Twemoji) Mar 2026
- detected YouTube Mar 2026
- dropped jQuery UI Oct 2025
- dropped Popup Maker Oct 2025