What powers jeffcolib.org?
Last seen Aug 2026 · 11 technologies across 8 categories
Analytics
Google Analytics
since Jan 2019
Font scripts
Google Font API
since Apr 2019
JavaScript libraries
Closure Library
since Oct 2023
Marked
since Jul 2026
Load balancers
Amazon ALB
since Nov 2025
Miscellaneous
Open Graph
since Sep 2022
PaaS
Amazon Web Services
since Nov 2025
Segmentation
Adobe Audience Manager
since Nov 2025
Webmail
Google Workspace
since Aug 2022
AI Crawlers
No robots.txt, so all AI crawlers are allowed by default. Checked Aug 2026.
- robots.txt not found
- llms.txt not found
- ai.txt not found
AI Crawlers
No robots.txt, all AI crawlers allowed
Audience
- 65% phone
- 36% desktop
United States
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
2.39 / 10 · ranked #2,703,750 of all domains
24 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.9 s |
| INP | 75 ms |
| CLS | 0.05 |
| TTFB | 500 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: English (United States)
- CDN: Google
- Weight: 7.9 MB · 180 requests
- Structured data: Microdata, OpenGraph
Homepage as crawled by the HTTP Archive, Aug 2026.
Full technology history →
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Recent changes
- detected Marked Jul 2026
- detected Closure Library Jan 2026
- dropped Google Sites Dec 2025
- detected Adobe Audience Manager Nov 2025
- detected Amazon ALB Nov 2025
- detected Amazon Web Services Nov 2025