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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
0.90g CO2 per view
FIX
0.90g CO2 per view
Info::
0.90g CO2 per page view
This page transfers 3.8 MB, producing an estimated 0.90g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.02g, network 0.19g, end-user device 0.69g.
Got: 0.90g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 107.7 kg CO2/year
With 10,000 page views per month, this page would generate approximately 107.7 kg of CO2 annually — equivalent to charging 13461 smartphones.
Info::
Green hosting reduces data center emissions

0.90g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 42% of websites

Sustainable Web Design model v4 · Page size: 3.8 MB

Your site
0.90g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.02g
Network
0.19g
End-user device
0.69g
At 10,000 monthly views: Monthly: 9.0 kg · Annual: 107.7 kg · ≈ 13461 smartphone charges
D
Carbon Budget
Action
58th percentile
FIX
58th percentile
Warning::
0.90g CO2 — above the median website (0.60g)
Heavier than an estimated 42% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 58th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website

0.90g

58th percentile

Cleaner than 42% of websites

✗ Above the median website

vs Median 50% more
vs Target 79% 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
99% cached
PASS
99% cached
Info::
99% reduction on repeat visits
Returning visitors download only 56 KB (vs 3882 KB first visit). 39 of 40 resources are served from browser cache, saving 0.88g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 0.90g)
First visit
3882 KB
Repeat visit
56 KB

99% reduction on repeat visits

Saving 0.88g CO2 per returning visitor

39 resources served from cache · 1 resources re-downloaded

A+
Transfer Efficiency
98% efficient
PASS
98% efficient
Info::
Transfer efficiency: 98%
Only 93 KB of potential savings identified. Your page is well-optimized for size.
98% efficient

Total waste: 93 KB (2% of page weight)

Unused JS 93 KB

0.02g unnecessary CO2 per visit

Actual transfer 3882 KB
Theoretical minimum 3788 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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