What powers chuck.jp?
Last seen Aug 2026 · 22 technologies across 13 categories
Analytics
Google Analytics
since Dec 2025
Microsoft Clarity
since Aug 2026
CMS
Databases
MySQL
since Jan 2021
Font scripts
Google Font API
since Dec 2025
Twitter Emoji (Twemoji)
since Jan 2021
JavaScript libraries
Maps
Google Maps
since Dec 2025
Miscellaneous
Open Graph
since Sep 2022
RSS
since Dec 2022
Page builders
Performance
Priority Hints
since Dec 2025
Programming languages
PHP
since Jan 2021
Security
reCAPTCHA
since Dec 2021
Web servers
Nginx
since Jan 2021
WordPress plugins
AI Crawlers
Doesn't name any of the 33 AI crawlers we track in its robots.txt. Catch-all rules (User-agent: *) restrict some paths for every crawler, AI or not. Checked Aug 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Audience
- 62% desktop
- 38% phone
Japan
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
1.73 / 10 · ranked #4,784,227 of all domains
5 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.8 s |
| CLS | 0 |
| TTFB | 900 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: Japanese
- Weight: 3.5 MB · 121 requests
- WordPress theme: thegem-elementor (child: thegem-elementor-child) · all themes
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Aug 2026.
Full technology history →
Report an incorrect detection
Recent changes
- detected Microsoft Clarity Aug 2026
- dropped Site Kit Aug 2026
- detected Site Kit Jun 2026
- dropped Yoast SEO Apr 2026
- detected All in One SEO Mar 2026
- detected Google Analytics Mar 2026
- dropped Google Analytics Feb 2026
- dropped Site Kit Feb 2026
- dropped Bootstrap Jan 2026
- dropped Clipboard.js Jan 2026
- dropped Font Awesome Jan 2026
- dropped Lightning Jan 2026
- dropped Twitter Jan 2026
- dropped Twitter Ads Jan 2026
- dropped Xserver Jan 2026
- dropped YouTube Jan 2026
- dropped Cloudflare Dec 2025
- dropped Cloudflare Bot Management Dec 2025
- detected FancyBox Dec 2025
- detected Google Analytics Dec 2025
- detected Google Font API Dec 2025
- detected Google Maps Dec 2025
- detected jQuery UI Dec 2025
- detected Priority Hints Dec 2025
- detected Site Kit Dec 2025
- detected Swiper Dec 2025
- detected Twitter Emoji (Twemoji) Dec 2025
- detected Yoast SEO Dec 2025