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 LoadAction1.28g CO2 per viewFIX
CO2 Per Page Load
Action1.28g CO2 per view
1.28g CO2 per view
Warning::
1.28g CO2 per page view
This page transfers 4.5 MB, producing an estimated 1.28g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.24g, network 0.22g, end-user device 0.82g.
Got: 1.28g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 153.0 kg CO2/year
With 10,000 page views per month, this page would generate approximately 153.0 kg of CO2 annually — equivalent to charging 19127 smartphones.
1.28g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 31% of websites
Sustainable Web Design model v4 · Page size: 4.5 MB
Your site
1.28g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.24g
Network
0.22g
End-user device
0.82g
At 10,000 monthly views: Monthly: 12.8 kg · Annual: 153.0 kg · ≈ 19127 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 BudgetAction69th percentileFIX
Carbon Budget
Action69th percentile
69th percentile
Warning::
1.28g CO2 — above the median website (0.60g)
Heavier than an estimated 31% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 69th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
1.28g
69th percentile
Cleaner than 31% of websites
✗ Above the median website
vs Median 113% more
vs Target 155% 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 4610 KB first visit). 35 of 36 resources are served from browser cache, saving 1.27g CO2 per repeat visit.
Info::
Repeat visit: 0.00g CO2 (first visit: 1.28g)
First visit
4610 KB
Repeat visit
14 KB
100% reduction on repeat visits
Saving 1.27g CO2 per returning visitor
35 resources served from cache · 1 resources re-downloaded
A+Transfer Efficiency93% efficientPASS
Transfer Efficiency
93% efficient
93% efficient
Info::
Transfer efficiency: 93%
Only 341 KB of potential savings identified. Your page is well-optimized for size.
Total waste: 341 KB (7% of page weight)
Unused JS 341 KB
0.09g unnecessary CO2 per visit
Actual transfer 4610 KB
Theoretical minimum 4269 KB
Potential savings 341 KB (0.09g 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.