What powers lttr.jp?
Last seen Jun 2026 · 20 technologies across 16 categories
Advertising
Twitter Ads
since Feb 2024
Analytics
Authentication
Facebook Login
since Feb 2024
CDN
Cloudflare
since Mar 2025
Documentation
Zendesk
since Feb 2024
Mailgun
since Feb 2024
Issue trackers
Sentry
since Nov 2024
JavaScript frameworks
React
since Feb 2024
JavaScript libraries
Miscellaneous
Open Graph
since Oct 2022
PaaS
Amazon Web Services
since Feb 2024
Programming languages
Security
Cloudflare Bot Management
since Mar 2025
HSTS
since Oct 2022
UI frameworks
Animate.css
since Apr 2019
Web servers
Widgets
Twitter
since Apr 2019
Audience
Japan
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
3.30 / 10 · ranked #1,126,305 of all domains
15 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.1 s |
| CLS | 0 |
| TTFB | 300 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Language: Japanese
- Weight: 9.0 MB · 132 requests
- Structured data: JSON-LD, OpenGraph
Homepage as crawled by the HTTP Archive, Jul 2026.
Subdomains
| Host | Techs |
|---|---|
| lttr.jp | 18 |
| faq.lttr.jp | 6 |
Full technology history →
Report an incorrect detection
Recent changes
- detected Cloudflare May 2026
- detected Cloudflare Bot Management May 2026
- dropped Cowboy Dec 2025
- dropped Erlang Dec 2025
- dropped Heroku Dec 2025
- dropped Cloudflare Nov 2025
- dropped Cloudflare Bot Management Nov 2025