What powers 
zizmor.sh?
Last seen Sep 2026 · 6 technologies across 5 categories
Caching
Varnish
since Aug 2025
CDN
Cloudflare
since Aug 2025
Fastly
since Aug 2025
Font scripts
Google Font API
since Aug 2025
Miscellaneous
Open Graph
since Aug 2025
PaaS
GitHub Pages
since Aug 2025
AI Crawlers
No robots.txt, so all AI crawlers are allowed by default. Checked Nov 2026.
- robots.txt not found
- llms.txt not found
- ai.txt not found
AI Crawlers
No robots.txt, all AI crawlers allowed
Audience
- 100% desktop
United States
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
4.76 / 10 · ranked #270,172 of all domains
59 referring domains · OpenPageRank
Core Web Vitals
| LCP | 0.6 s |
| INP | 25 ms |
| CLS | 0 |
| TTFB | 300 ms |
Real user p75, Chrome UX Report, Oct 2026.
Infrastructure
- Hosted on Fastly (185.199.108.153, IPv6)
- DNS: Porkbun
- Email: no MX record returned
- SSL: Let's Encrypt, RSA 2048, expires Jan 2027
- Common Crawl link graph: rank 450,918, 2 hosts
DNS records as swept Nov 2026, certificate as seen Nov 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| zizmor.sh | 6 |
| docs.zizmor.sh | 5 |
Full technology history →
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