What powers retrohazard.jp?
Last seen Aug 2026 · 16 technologies across 10 categories
Analytics
Google Analytics
since Mar 2025
Caching
Varnish
since Mar 2025
CDN
Fastly
since Mar 2025
JavaScript frameworks
JavaScript graphics
Visx
since Aug 2026
Miscellaneous
PaaS
GitHub Pages
since Mar 2025
Performance
Priority Hints
since May 2025
Programming languages
Node.js
since May 2025
UI frameworks
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
- 50% desktop
- 50% phone
Japan
Where the site's Chrome visitors come from, largest estimated audience first.
Core Web Vitals
| LCP | 1.9 s |
| INP | 125 ms |
| CLS | 0 |
| TTFB | 300 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: English
- CDN: Fastly
- Weight: 1.1 MB · 23 requests
- Structured data: OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Aug 2026.
Full technology history →
Report an incorrect detection
Recent changes
- detected Open Graph Aug 2026
- detected PWA Aug 2026
- detected Radix UI Aug 2026
- detected shadcn/ui Aug 2026
- detected Visx Aug 2026