What powers 81dojo.com?
Last seen Jun 2026 · 17 technologies across 13 categories
Advertising
Google AdSense
since May 2020
Analytics
Cloudflare Browser Insights
since Jun 2026
CDN
Cloudflare
since Jun 2026
Font scripts
Google Font API
since Apr 2018
JavaScript graphics
Chart.js
since Aug 2018
JavaScript libraries
Miscellaneous
Open Graph
since Sep 2022
Performance
Turbolinks
since Nov 2021
Programming languages
Security
reCAPTCHA
since Apr 2022
Web frameworks
Ruby on Rails
since Aug 2018
Web servers
Apache HTTP Server
since Apr 2018
Webmail
Google Workspace
since Aug 2022
Audience
- 98% desktop
- 2% phone
Japan
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
3.48 / 10 · ranked #910,529 of all domains
43 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.8 s |
| INP | 125 ms |
| CLS | 0.4 |
| TTFB | 100 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Weight: 0.9 MB · 25 requests
- Structured data: OpenGraph
Homepage as crawled by the HTTP Archive, Jul 2026.
Subdomains
| Host | Techs |
|---|---|
| system.81dojo.com | 12 |
| 81dojo.com | 8 |
| wsl.81dojo.com | 6 |
| www.81dojo.com | 3 |
Full technology history →
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Recent changes
- detected Cloudflare Jun 2026
- detected Cloudflare Browser Insights Jun 2026