https://google.fr
Sustainability
· 6 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
84
GRADE
B
FIX
1
REVIEW
1
PASS
4
INFO
0
Checks
64 PASS 1 REVIEW 1 FIX
DTransfer EfficiencyAction53% efficientFIX
Transfer Efficiency
Action53% efficient
53% efficient
Warning::
Transfer efficiency: 53%
An estimated 380 KB (47%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 380 KB of unused JavaScript. This wasted data produces 0.09g of unnecessary CO2 per page view.
Total waste: 380 KB (47% of page weight)
Unused JS 380 KB
0.09g unnecessary CO2 per visit
Actual transfer 811 KB
Theoretical minimum 430 KB
Potential savings 380 KB (0.09g CO2)
See Deep Analysis sections above for specific optimizations.
BGreen HostingGreen (hosting)REVIEW
Green Hosting
Green (hosting)
Green (hosting)
Info::
Google Web Server uses renewable energy
Info::
Google Web Server: 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 Google Web Server✓CDN Not identified✗
Google Web Server: Verified by the Green Web Foundation
Based on known provider commitments. Verify at thegreenwebfoundation.org
A+CO2 Per Page Load0.19g CO2 per viewPASS
CO2 Per Page Load
0.19g CO2 per view
0.19g CO2 per view
Info::
0.19g CO2 per page view
This page transfers 0.8 MB, producing an estimated 0.19g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.00g, network 0.04g, end-user device 0.14g.
Got: 0.19g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 22.5 kg CO2/year
With 10,000 page views per month, this page would generate approximately 22.5 kg of CO2 annually — equivalent to charging 2812 smartphones.
Info::
Green hosting reduces data center emissions
0.19g
Carbon Footprint per page view
✓ Below sustainability target (0.50g)
Cleaner than 90% of websites
Sustainable Web Design model v4 · Page size: 0.8 MB
Your site
0.19g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.00g
Network
0.04g
End-user device
0.14g
At 10,000 monthly views: Monthly: 1.9 kg · Annual: 22.5 kg · ≈ 2812 smartphone charges
A+Repeat Visit Weight93% cachedPASS
Repeat Visit Weight
93% cached
93% cached
Info::
93% reduction on repeat visits
Returning visitors download only 59 KB (vs 811 KB first visit). 44 of 45 resources are served from browser cache, saving 0.17g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 0.19g)
First visit
811 KB
Repeat visit
59 KB
93% reduction on repeat visits
Saving 0.17g CO2 per returning visitor
44 resources served from cache · 1 resources re-downloaded
A+Carbon Budget10th percentilePASS
Carbon Budget
10th percentile
10th percentile
Info::
0.19g CO2 — below the sustainability target of 0.50g
Cleaner than an estimated 90% of websites analyzed. This page meets the Web Sustainability Guidelines target.
Info::
Estimated 10th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
0.19g
10th percentile
Cleaner than 90% of websites
✓ Below the Web Sustainability Guidelines target
vs Median 69% cleaner ✓
vs Target 62% cleaner ✓
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: Google Cloud
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.