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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
1
REVIEW
3
PASS
2
INFO
0
Device:
Mobile Desktop
Checks
6
2 PASS 3 REVIEW 1 FIX
D
Carbon Budget
Action
54th percentile
FIX
54th percentile
Warning::
0.76g CO2 — above the median website (0.60g)
Heavier than an estimated 46% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 54th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website

0.76g

54th percentile

Cleaner than 46% of websites

✗ Above the median website

vs Median 27% more
vs Target 52% more
B
CO2 Per Page Load
0.76g CO2 per view
REVIEW
0.76g CO2 per view
Info::
0.76g CO2 per page view
This page transfers 3.2 MB, producing an estimated 0.76g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.02g, network 0.16g, end-user device 0.58g.
Got: 0.76g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 91.2 kg CO2/year
With 10,000 page views per month, this page would generate approximately 91.2 kg of CO2 annually — equivalent to charging 11405 smartphones.
Info::
Green hosting reduces data center emissions

0.76g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 46% of websites

Sustainable Web Design model v4 · Page size: 3.2 MB

Your site
0.76g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.02g
Network
0.16g
End-user device
0.58g
At 10,000 monthly views: Monthly: 7.6 kg · Annual: 91.2 kg · ≈ 11405 smartphone charges
B
Green Hosting
Green (hosting)
REVIEW
Green (hosting)
Info::
OVHcloud uses renewable energy
Info::
OVHcloud: 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 OVHcloud✓CDN Not identified✗

OVHcloud: Verified by the Green Web Foundation

Based on known provider commitments. Verify at thegreenwebfoundation.org

B
Transfer Efficiency
78% efficient
REVIEW
78% efficient
Info::
Transfer efficiency: 78%
An estimated 728 KB (22%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 728 KB of unused JavaScript. This wasted data produces 0.17g of unnecessary CO2 per page view.
78% efficient

Total waste: 728 KB (22% of page weight)

Unused JS 728 KB

0.17g unnecessary CO2 per visit

Actual transfer 3289 KB
Theoretical minimum 2561 KB
Potential savings 728 KB (0.17g CO2)

See Deep Analysis sections above for specific optimizations.

A+
Repeat Visit Weight
96% cached
PASS
96% cached
Info::
96% reduction on repeat visits
Returning visitors download only 121 KB (vs 3289 KB first visit). 511 of 574 resources are served from browser cache, saving 0.73g CO2 per repeat visit.
Info::
Repeat visit: 0.03g CO2 (first visit: 0.76g)
First visit
3289 KB
Repeat visit
121 KB

96% reduction on repeat visits

Saving 0.73g CO2 per returning visitor

511 resources served from cache · 63 resources re-downloaded

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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