Skip to content
Checks
8
4 PASS 2 REVIEW 1 FIX
D
Green Hosting
Action
Not green
FIX
Not green
Info::
No confirmed renewable energy commitment detected
Consider providers like Cloudflare, Google Cloud, or Vercel that match 100% of their energy use with renewables.
Info::
Azure: Microsoft is carbon-negative; Azure renewable varies by region
Info::
Green hosting status based on known provider commitments
Green hosting detection uses a curated database of provider renewable energy commitments. This is not a real-time verification. For authoritative checks, visit thegreenwebfoundation.org.
Green HostingNot Green Hosted
Hosting AzureCDN Not identified

Azure: Microsoft is carbon-negative; Azure renewable varies by region

Based on known provider commitments. Verify at thegreenwebfoundation.org

B
Web Font Weight Variants
No detectable Google Fonts weights
REVIEW
No detectable Google Fonts weights
Info::
No detectable Google Fonts weights
The analyzer detects font weights via Google Fonts URL parameters (~70% of font-using sites). Self-hosted fonts and non-Google CDN fonts aren't visible to URL-based detection. If you self-host fonts, manually audit how many @font-face weights you ship -- 2-3 weights per family is typically enough; 5+ is usually unused payload.
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
CO2 Per Page Load
0.19g CO2 per view
PASS
0.19g CO2 per view
Info::
0.19g CO2 per page view
This page transfers 0.7 MB, producing an estimated 0.19g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.04g, network 0.03g, end-user device 0.12g.
Got: 0.19g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 23.2 kg CO2/year
With 10,000 page views per month, this page would generate approximately 23.2 kg of CO2 annually — equivalent to charging 2898 smartphones.

0.19g

Carbon Footprint per page view

Below sustainability target (0.50g)

Cleaner than 90% of websites

Sustainable Web Design model v4 · Page size: 0.7 MB

Your site
0.19g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.04g
Network
0.03g
End-user device
0.12g
At 10,000 monthly views: Monthly: 1.9 kg · Annual: 23.2 kg · ≈ 2898 smartphone charges
A+
Repeat Visit Weight
89% cached
PASS
89% cached
Info::
89% reduction on repeat visits
Returning visitors download only 74 KB (vs 698 KB first visit). 19 of 20 resources are served from browser cache, saving 0.17g CO2 per repeat visit.
Info::
Repeat visit: 0.02g CO2 (first visit: 0.19g)
First visit
698 KB
Repeat visit
74 KB

89% reduction on repeat visits

Saving 0.17g CO2 per returning visitor

19 resources served from cache · 1 resources re-downloaded

A+
Carbon Budget
10th percentile
PASS
10th percentile
Info::
0.19g CO2 — below the sustainability target of 0.50g
Cleaner than an estimated 90% of websites analyzed. This page meets the Web Sustainability Guidelines target.
Info::
Estimated 10th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website

0.19g

10th percentile

Cleaner than 90% of websites

Below the Web Sustainability Guidelines target

vs Median 68% cleaner ✓
vs Target 61% cleaner ✓
A+
Transfer Efficiency
100% efficient
PASS
100% efficient
Info::
Transfer efficiency: 100%
Only 0 KB of potential savings identified. Your page is well-optimized for size.
100% efficient
Actual transfer 698 KB
Theoretical minimum 698 KB

See Deep Analysis sections above for specific optimizations.

Image Optimization
2 images, 0 KB total, 0 KB wasted
INFO

Image Optimization Audit

Total Images

2

Total Size

0 KB

Oversized

2

2 missing alt text 2 missing dimensions
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

Send Feedback