What powers dualletter.site?
Last seen Jun 2026 · 15 technologies across 8 categories
JavaScript frameworks
JavaScript graphics
ApexCharts.js
since Nov 2024
Chart.js
since Nov 2024
JavaScript libraries
Miscellaneous
Popper
since Nov 2024
PaaS
Amazon Web Services
since Nov 2024
Rich text editors
Quill
since Nov 2024
UI frameworks
Web servers
Nginx
since Aug 2025
Audience
- 100% desktop
Costa Rica
Countries where the site has Chrome traffic, strongest markets first.
Core Web Vitals
| LCP | 5.7 s |
| INP | 25 ms |
| CLS | 0 |
| TTFB | 5600 ms |
Real user p75, Chrome UX Report, Jun 2026.
Full technology history →
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Recent changes
- dropped Ubuntu Jun 2026
- dropped Apache HTTP Server Sep 2025
- detected Nginx Aug 2025