What powers zermelo.academy?
Last seen Aug 2026 · 11 technologies across 10 categories
Font scripts
Google Font API
since Feb 2025
JavaScript frameworks
Vue.js
since Feb 2025
JavaScript libraries
PaaS
Amazon Web Services
since Jan 2023
Programming languages
Java
since Jan 2023
Rich text editors
CKEditor
since Jan 2023
Security
HSTS
since Jan 2023
UI frameworks
Element UI
since Feb 2025
Tailwind CSS
since Feb 2025
Video players
VideoJS
since Jan 2023
Web servers
Apache APISIX
since Feb 2026
AI Crawlers
No robots.txt, so all AI crawlers are allowed by default. Checked Aug 2026.
- robots.txt not found
- llms.txt not found
- ai.txt not found
AI Crawlers
No robots.txt, all AI crawlers allowed
Audience
- 60% phone
- 40% desktop
Netherlands
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
0.25 / 10 · ranked #69,472,902 of all domains
0 referring domains · OpenPageRank
Core Web Vitals
| LCP | 2.6 s |
| INP | 75 ms |
| CLS | 0.05 |
| TTFB | 500 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: Dutch
- Weight: 11.4 MB · 81 requests
Homepage as crawled by the HTTP Archive, Sep 2026.
Full technology history →
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Recent changes
- dropped Amazon ALB Mar 2026
- dropped Nginx Mar 2026
- detected Apache APISIX Feb 2026