https://casalini.eu
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
58
GRADE
D
FIX
3
REVIEW
2
PASS
2
INFO
1
Checks
82 PASS 2 REVIEW 3 FIX
FCO2 Per Page LoadAction12.77g CO2 per viewFIX
CO2 Per Page Load
Action12.77g CO2 per view
12.77g CO2 per view
Critical::
12.77g CO2 per page view
This page transfers 45.1 MB, producing an estimated 12.77g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 2.36g, network 2.21g, end-user device 8.20g.
Got: 12.77g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 1532.2 kg CO2/year
With 10,000 page views per month, this page would generate approximately 1532.2 kg of CO2 annually — equivalent to charging 191522 smartphones.
12.77g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 5% of websites
Sustainable Web Design model v4 · Page size: 45.1 MB
Your site
12.77g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
2.36g
Network
2.21g
End-user device
8.20g
At 10,000 monthly views: Monthly: 127.7 kg · Annual: 1532.2 kg · ≈ 191522 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
FCarbon BudgetAction95th percentileFIX
Carbon Budget
Action95th percentile
95th percentile
Warning::
12.77g CO2 — above the median website (0.60g)
Heavier than an estimated 5% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 95th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
12.77g
95th percentile
Cleaner than 5% of websites
✗ Above the median website
vs Median 2028% more
vs Target 2454% more
CWeb Font Weight VariantsAction18 font weights loaded across 1 famil(y/ies)REVIEW
Web Font Weight Variants
Action18 font weights loaded across 1 famil(y/ies)
18 font weights loaded across 1 famil(y/ies)
Warning::
18 font weights loaded -- likely 100+ KB of unused payload
Loading 18 font weights typically transfers 200-400 KB just for fonts. Most pages legitimately use 2-3 weights (regular + bold, maybe medium). Audit which weights your stylesheet actually applies and trim the Google Fonts URL accordingly. Affected families: Rajdhani.
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 31 KB (vs 46167 KB first visit). 92 of 93 resources are served from browser cache, saving 12.76g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 12.77g)
First visit
46167 KB
Repeat visit
31 KB
100% reduction on repeat visits
Saving 12.76g CO2 per returning visitor
92 resources served from cache · 1 resources re-downloaded
A+Transfer Efficiency100% efficientPASS
Transfer Efficiency
100% efficient
100% efficient
Info::
Transfer efficiency: 100%
Only 57 KB of potential savings identified. Your page is well-optimized for size.
Total waste: 57 KB (0% of page weight)
Unused JS 57 KB
0.02g unnecessary CO2 per visit
Actual transfer 46167 KB
Theoretical minimum 46110 KB
Potential savings 57 KB (0.02g CO2)
See Deep Analysis sections above for specific optimizations.
Image Optimization53 images, 38649 KB total, 14893 KB wastedINFO
Image Optimization
53 images, 38649 KB total, 14893 KB wasted
Image Optimization Audit
Total Images
53
Total Size
38649 KB
Oversized
12
Wasted
14893 KB
34 missing dimensions 41 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.