https://tft-couverture.fr
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
73
GRADE
C
FIX
3
REVIEW
2
PASS
2
INFO
1
Checks
82 PASS 2 REVIEW 3 FIX
DCO2 Per Page LoadAction1.19g CO2 per viewFIX
CO2 Per Page Load
Action1.19g CO2 per view
1.19g CO2 per view
Warning::
1.19g CO2 per page view
This page transfers 4.2 MB, producing an estimated 1.19g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.22g, network 0.21g, end-user device 0.76g.
Got: 1.19g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 142.7 kg CO2/year
With 10,000 page views per month, this page would generate approximately 142.7 kg of CO2 annually — equivalent to charging 17835 smartphones.
1.19g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 34% of websites
Sustainable Web Design model v4 · Page size: 4.2 MB
Your site
1.19g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.22g
Network
0.21g
End-user device
0.76g
At 10,000 monthly views: Monthly: 11.9 kg · Annual: 142.7 kg · ≈ 17835 smartphone charges
DGreen HostingActionUnknownFIX
Green Hosting
ActionUnknown
Unknown
Info::
Hosting provider could not be identified
Without knowing the provider, we cannot determine their energy sourcing. Check with your hosting provider about their renewable energy commitments.
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 HostingUnable to Determine
Hosting Not identified✗CDN Not identified✗
Based on known provider commitments. Verify at thegreenwebfoundation.org
DCarbon BudgetAction66th percentileFIX
Carbon Budget
Action66th percentile
66th percentile
Warning::
1.19g CO2 — above the median website (0.60g)
Heavier than an estimated 34% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 66th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
1.19g
66th percentile
Cleaner than 34% of websites
✗ Above the median website
vs Median 98% more
vs Target 138% more
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 14 KB (vs 4299 KB first visit). 37 of 38 resources are served from browser cache, saving 1.18g CO2 per repeat visit.
Info::
Repeat visit: 0.00g CO2 (first visit: 1.19g)
First visit
4299 KB
Repeat visit
14 KB
100% reduction on repeat visits
Saving 1.18g CO2 per returning visitor
37 resources served from cache · 1 resources re-downloaded
A+Transfer Efficiency95% efficientPASS
Transfer Efficiency
95% efficient
95% efficient
Info::
Transfer efficiency: 95%
Only 224 KB of potential savings identified. Your page is well-optimized for size.
Total waste: 224 KB (5% of page weight)
Unused JS 224 KB
0.06g unnecessary CO2 per visit
Actual transfer 4299 KB
Theoretical minimum 4075 KB
Potential savings 224 KB (0.06g CO2)
See Deep Analysis sections above for specific optimizations.
Image Optimization15 images, 386 KB total, 335 KB wastedINFO
Image Optimization
15 images, 386 KB total, 335 KB wasted
Image Optimization Audit
Total Images
15
Total Size
386 KB
Oversized
2
Wasted
335 KB
2 missing dimensions 14 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.