https://Logosdown.com
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
78
GRADE
C
FIX
1
REVIEW
3
PASS
3
INFO
1
Checks
83 PASS 3 REVIEW 1 FIX
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
BTransfer Efficiency77% efficientREVIEW
Transfer Efficiency
77% efficient
77% efficient
Info::
Transfer efficiency: 77%
An estimated 195 KB (23%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 195 KB of unused JavaScript. This wasted data produces 0.05g of unnecessary CO2 per page view.
Total waste: 195 KB (23% of page weight)
Unused JS 195 KB
0.05g unnecessary CO2 per visit
Actual transfer 864 KB
Theoretical minimum 668 KB
Potential savings 195 KB (0.05g CO2)
See Deep Analysis sections above for specific optimizations.
CWeb Font Weight VariantsAction31 font weights loaded across 8 famil(y/ies)REVIEW
Web Font Weight Variants
Action31 font weights loaded across 8 famil(y/ies)
31 font weights loaded across 8 famil(y/ies)
Warning::
31 font weights loaded -- likely 100+ KB of unused payload
Loading 31 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: Archivo, Google%20Sans%20Text%3A400%2C500, Google%20Sans%20Text%3A400%2C500%2C700, Google%20Sans%3A400, Google%20Sans%3A700, Google%20Symbols%3Aopsz%2Cwght%2CFILL%2CGRAD%4020..48%2C100..700%2C0..1%2C-50..200, Poppins, Roboto%3A500.
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
ACO2 Per Page Load0.24g CO2 per viewPASS
CO2 Per Page Load
0.24g CO2 per view
0.24g CO2 per view
Info::
0.24g CO2 per page view
This page transfers 0.8 MB, producing an estimated 0.24g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.04g, network 0.04g, end-user device 0.15g.
Got: 0.24g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 28.7 kg CO2/year
With 10,000 page views per month, this page would generate approximately 28.7 kg of CO2 annually — equivalent to charging 3584 smartphones.
0.24g
Carbon Footprint per page view
✓ Below sustainability target (0.50g)
Cleaner than 87% of websites
Sustainable Web Design model v4 · Page size: 0.8 MB
Your site
0.24g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.04g
Network
0.04g
End-user device
0.15g
At 10,000 monthly views: Monthly: 2.4 kg · Annual: 28.7 kg · ≈ 3584 smartphone charges
A+Repeat Visit Weight98% cachedPASS
Repeat Visit Weight
98% cached
98% cached
Info::
98% reduction on repeat visits
Returning visitors download only 15 KB (vs 864 KB first visit). 59 of 60 resources are served from browser cache, saving 0.23g CO2 per repeat visit.
Info::
Repeat visit: 0.00g CO2 (first visit: 0.24g)
First visit
864 KB
Repeat visit
15 KB
98% reduction on repeat visits
Saving 0.23g CO2 per returning visitor
59 resources served from cache · 1 resources re-downloaded
ACarbon Budget13th percentilePASS
Carbon Budget
13th percentile
13th percentile
Info::
0.24g CO2 — below the sustainability target of 0.50g
Cleaner than an estimated 87% of websites analyzed. This page meets the Web Sustainability Guidelines target.
Info::
Estimated 13th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
0.24g
13th percentile
Cleaner than 87% of websites
✓ Below the Web Sustainability Guidelines target
vs Median 60% cleaner ✓
vs Target 52% cleaner ✓
Image Optimization3 images, 127 KB total, 94 KB wastedINFO
Image Optimization
3 images, 127 KB total, 94 KB wasted
Image Optimization Audit
Total Images
3
Total Size
127 KB
Oversized
1
Wasted
94 KB
1 missing dimensions
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.