What powers 4s.link?
Last seen Aug 2026 · 26 technologies across 16 categories
Analytics
Authentication
CDN
Development
Font scripts
JavaScript frameworks
JavaScript graphics
JavaScript libraries
Miscellaneous
PaaS
Performance
Programming languages
Security
Tag managers
UI frameworks
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 Sep 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
- Sep 2026 *: Restricted (was Blocked)
- Aug 2026 *: Blocked (was Restricted)
- Aug 2026 *: Restricted (was Blocked)
AI Crawlers
No AI crawlers blocked
Audience
- 69% desktop
- 31% phone
Japan
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.91 / 10 · ranked #639,736 of all domains
45 referring domains · OpenPageRank
Search traffic
0 est. monthly organic visits (US)
8 keywords in Google's top 30
Core Web Vitals
| LCP | 2.6 s |
| INP | 75 ms |
| CLS | 0.1 |
| TTFB | 900 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- CDN: Amazon CloudFront
- Weight: 2.9 MB · 118 requests
- Structured data: OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Sep 2026.
Subdomains
| Host | Techs |
|---|---|
| 4s.link | 20 |
| spikes.4s.link | 15 |
| xdeal.4s.link | 14 |
| ivs2026-mv.4s.link | 13 |
Full technology history →
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Recent changes
- detected core-js Jul 2026
- detected Facebook Pixel Jul 2026
- detected Swiper Jul 2026
- detected Three.js Jul 2026
- detected Turbopack Jun 2026
- detected Google Tag Manager Apr 2026
- detected PWA Apr 2026