https://kieljamespatrick.com
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
81
GRADE
B
FIX
2
REVIEW
1
PASS
4
INFO
1
Checks
84 PASS 1 REVIEW 2 FIX
DCO2 Per Page LoadAction1.14g CO2 per viewFIX
CO2 Per Page Load
Action1.14g CO2 per view
1.14g CO2 per view
Warning::
1.14g CO2 per page view
This page transfers 4.8 MB, producing an estimated 1.14g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.03g, network 0.24g, end-user device 0.88g.
Got: 1.14g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 137.0 kg CO2/year
With 10,000 page views per month, this page would generate approximately 137.0 kg of CO2 annually — equivalent to charging 17119 smartphones.
Info::
Green hosting reduces data center emissions
1.14g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 35% of websites
Sustainable Web Design model v4 · Page size: 4.8 MB
Your site
1.14g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.03g
Network
0.24g
End-user device
0.88g
At 10,000 monthly views: Monthly: 11.4 kg · Annual: 137.0 kg · ≈ 17119 smartphone charges
DCarbon BudgetAction65th percentileFIX
Carbon Budget
Action65th percentile
65th percentile
Warning::
1.14g CO2 — above the median website (0.60g)
Heavier than an estimated 35% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 65th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
1.14g
65th percentile
Cleaner than 35% of websites
✗ Above the median website
vs Median 90% more
vs Target 128% more
BWeb Font Weight VariantsNo detectable Google Fonts weightsREVIEW
Web Font Weight Variants
No detectable Google Fonts weights
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.
A+Green HostingGreen (both)PASS
Green Hosting
Green (both)
Green (both)
Info::
Both hosting and CDN use renewable energy
Got: Hosting: Cloudflare, CDN: Cloudflare
Info::
Cloudflare: Verified by the Green Web Foundation
Info::
Cloudflare: 100% renewable energy for global network since 2019
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 Hosting✓ Green Hosted
Hosting Cloudflare✓CDN Cloudflare✓
Cloudflare: Verified by the Green Web Foundation
Cloudflare: 100% renewable energy for global network since 2019
Based on known provider commitments. Verify at thegreenwebfoundation.org
A+Repeat Visit Weight98% cachedPASS
Repeat Visit Weight
98% cached
98% cached
Info::
98% reduction on repeat visits
Returning visitors download only 96 KB (vs 4937 KB first visit). 233 of 235 resources are served from browser cache, saving 1.12g CO2 per repeat visit.
Info::
Repeat visit: 0.02g CO2 (first visit: 1.14g)
First visit
4937 KB
Repeat visit
96 KB
98% reduction on repeat visits
Saving 1.12g CO2 per returning visitor
233 resources served from cache · 2 resources re-downloaded
A+Transfer Efficiency95% efficientPASS
Transfer Efficiency
95% efficient
95% efficient
Info::
Transfer efficiency: 95%
Only 226 KB of potential savings identified. Your page is well-optimized for size.
Total waste: 226 KB (5% of page weight)
Unused JS 226 KB
0.05g unnecessary CO2 per visit
Actual transfer 4937 KB
Theoretical minimum 4711 KB
Potential savings 226 KB (0.05g CO2)
See Deep Analysis sections above for specific optimizations.
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
Whether the site is served from green-energy infrastructure
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
Image Optimization68 images, 124 KB total, 0 KB wastedINFO
Image Optimization
68 images, 124 KB total, 0 KB wasted
Image Optimization Audit
Total Images
68
Total Size
124 KB
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.