What powers fermatslibrary.com?
Last seen Jun 2026 · 17 technologies across 12 categories
Analytics
CDN
cdnjs
since Nov 2021
Cloudflare
since May 2022
Font scripts
Google Font API
since Aug 2018
JavaScript graphics
JavaScript libraries
Miscellaneous
Open Graph
since Sep 2022
PaaS
Amazon Web Services
since Aug 2020
Heroku
since Aug 2020
Programming languages
Ruby
since Aug 2018
Security
HSTS
since Sep 2022
UI frameworks
Web frameworks
Ruby on Rails
since Aug 2018
Audience
- 54% phone
- 46% desktop
India
United Kingdom
Italy
United States
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
4.50 / 10 · ranked #401,824 of all domains
163 referring domains · OpenPageRank
Core Web Vitals
| LCP | 2.7 s |
| INP | 100 ms |
| CLS | 0 |
| TTFB | 1100 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Weight: 3.0 MB · 22 requests
- Structured data: OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Jul 2026.
Subdomains
| Host | Techs |
|---|---|
| www.fermatslibrary.com | 17 |
| fermatslibrary.com | 16 |
Full technology history →
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Recent changes
- dropped WEBrick Aug 2025