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Sustainability

· 6 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.
SCORE
76
GRADE
C
FIX
2
REVIEW
1
PASS
3
INFO
0
Device:
Mobile Desktop
Checks
6
3 PASS 1 REVIEW 2 FIX
D
CO2 Per Page Load
Action
0.87g CO2 per view
FIX
0.87g CO2 per view
Info::
0.87g CO2 per page view
This page transfers 3.7 MB, producing an estimated 0.87g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.02g, network 0.18g, end-user device 0.67g.
Got: 0.87g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 104.0 kg CO2/year
With 10,000 page views per month, this page would generate approximately 104.0 kg of CO2 annually — equivalent to charging 12996 smartphones.
Info::
Green hosting reduces data center emissions

0.87g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 43% of websites

Sustainable Web Design model v4 · Page size: 3.7 MB

Your site
0.87g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.02g
Network
0.18g
End-user device
0.67g
At 10,000 monthly views: Monthly: 8.7 kg · Annual: 104.0 kg · ≈ 12996 smartphone charges
D
Carbon Budget
Action
57th percentile
FIX
57th percentile
Warning::
0.87g CO2 — above the median website (0.60g)
Heavier than an estimated 43% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 57th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website

0.87g

57th percentile

Cleaner than 43% of websites

✗ Above the median website

vs Median 44% more
vs Target 73% more
B
Green Hosting
Green (hosting)
REVIEW
Green (hosting)
Info::
Microsoft IIS uses renewable energy
Info::
Microsoft IIS: Verified by the Green Web Foundation
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 Microsoft IIS✓CDN Not identified✗

Microsoft IIS: Verified by the Green Web Foundation

Based on known provider commitments. Verify at thegreenwebfoundation.org

A+
Repeat Visit Weight
98% cached
PASS
98% cached
Info::
98% reduction on repeat visits
Returning visitors download only 56 KB (vs 3748 KB first visit). 30 of 31 resources are served from browser cache, saving 0.85g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 0.87g)
First visit
3748 KB
Repeat visit
56 KB

98% reduction on repeat visits

Saving 0.85g CO2 per returning visitor

30 resources served from cache · 1 resources re-downloaded

A+
Transfer Efficiency
97% efficient
PASS
97% efficient
Info::
Transfer efficiency: 97%
Only 93 KB of potential savings identified. Your page is well-optimized for size.
97% efficient

Total waste: 93 KB (3% of page weight)

Unused JS 93 KB

0.02g unnecessary CO2 per visit

Actual transfer 3748 KB
Theoretical minimum 3654 KB
Potential savings 93 KB (0.02g CO2)

See Deep Analysis sections above for specific optimizations.

A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: OVHcloud

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

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