https://portal.kumorai.io
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
61
GRADE
D
FIX
4
REVIEW
2
PASS
1
INFO
1
Checks
81 PASS 2 REVIEW 4 FIX
DCO2 Per Page LoadAction0.93g CO2 per viewFIX
CO2 Per Page Load
Action0.93g CO2 per view
0.93g CO2 per view
Info::
0.93g CO2 per page view
This page transfers 3.3 MB, producing an estimated 0.93g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.17g, network 0.16g, end-user device 0.59g.
Got: 0.93g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 111.1 kg CO2/year
With 10,000 page views per month, this page would generate approximately 111.1 kg of CO2 annually — equivalent to charging 13887 smartphones.
0.93g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 41% of websites
Sustainable Web Design model v4 · Page size: 3.3 MB
Your site
0.93g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.17g
Network
0.16g
End-user device
0.59g
At 10,000 monthly views: Monthly: 9.3 kg · Annual: 111.1 kg · ≈ 13887 smartphone charges
DGreen HostingActionNot greenFIX
Green Hosting
ActionNot green
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 Azure✗CDN Not identified✗
Azure: Microsoft is carbon-negative; Azure renewable varies by region
Based on known provider commitments. Verify at thegreenwebfoundation.org
DCarbon BudgetAction59th percentileFIX
Carbon Budget
Action59th percentile
59th percentile
Warning::
0.93g CO2 — above the median website (0.60g)
Heavier than an estimated 41% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 59th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
0.93g
59th percentile
Cleaner than 41% of websites
✗ Above the median website
vs Median 54% more
vs Target 85% more
DTransfer EfficiencyAction40% efficientFIX
Transfer Efficiency
Action40% efficient
40% efficient
Critical::
Transfer efficiency: 40%
An estimated 2001 KB (60%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 2001 KB of unused JavaScript. This wasted data produces 0.55g of unnecessary CO2 per page view.
Total waste: 2001 KB (60% of page weight)
Unused JS 2001 KB
0.55g unnecessary CO2 per visit
Actual transfer 3347 KB
Theoretical minimum 1345 KB
Potential savings 2001 KB (0.55g CO2)
See Deep Analysis sections above for specific optimizations.
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.
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
ActionWhether the site is served from green-energy infrastructure
Green Hosting
No green hosting detected
A+Repeat Visit Weight100% cachedPASS
Repeat Visit Weight
100% cached
100% cached
Info::
100% reduction on repeat visits
Returning visitors download only 1 KB (vs 3347 KB first visit). 23 of 24 resources are served from browser cache, saving 0.93g CO2 per repeat visit.
Info::
Repeat visit: 0.00g CO2 (first visit: 0.93g)
First visit
3347 KB
Repeat visit
1 KB
100% reduction on repeat visits
Saving 0.93g CO2 per returning visitor
23 resources served from cache · 1 resources re-downloaded
Image Optimization2 images, 5 KB total, 0 KB wastedINFO
Image Optimization
2 images, 5 KB total, 0 KB wasted
Image Optimization Audit
Total Images
2
Total Size
5 KB
2 missing dimensions 1 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.