https://specialistaseo.net
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 Efficiency82% efficientREVIEW
Transfer Efficiency
82% efficient
82% efficient
Info::
Transfer efficiency: 82%
An estimated 259 KB (18%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 259 KB of unused JavaScript. This wasted data produces 0.07g of unnecessary CO2 per page view.
Total waste: 259 KB (18% of page weight)
Unused JS 259 KB
0.07g unnecessary CO2 per visit
Actual transfer 1469 KB
Theoretical minimum 1210 KB
Potential savings 259 KB (0.07g CO2)
See Deep Analysis sections above for specific optimizations.
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: Roboto.
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 Load0.41g CO2 per viewPASS
CO2 Per Page Load
0.41g CO2 per view
0.41g CO2 per view
Info::
0.41g CO2 per page view
This page transfers 1.4 MB, producing an estimated 0.41g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.08g, network 0.07g, end-user device 0.26g.
Got: 0.41g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 48.8 kg CO2/year
With 10,000 page views per month, this page would generate approximately 48.8 kg of CO2 annually — equivalent to charging 6095 smartphones.
0.41g
Carbon Footprint per page view
✓ Below sustainability target (0.50g)
Cleaner than 70% of websites
Sustainable Web Design model v4 · Page size: 1.4 MB
Your site
0.41g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.08g
Network
0.07g
End-user device
0.26g
At 10,000 monthly views: Monthly: 4.1 kg · Annual: 48.8 kg · ≈ 6095 smartphone charges
A+Repeat Visit Weight97% cachedPASS
Repeat Visit Weight
97% cached
97% cached
Info::
97% reduction on repeat visits
Returning visitors download only 41 KB (vs 1469 KB first visit). 109 of 110 resources are served from browser cache, saving 0.39g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 0.41g)
First visit
1469 KB
Repeat visit
41 KB
97% reduction on repeat visits
Saving 0.39g CO2 per returning visitor
109 resources served from cache · 1 resources re-downloaded
ACarbon Budget30th percentilePASS
Carbon Budget
30th percentile
30th percentile
Info::
0.41g CO2 — below the sustainability target of 0.50g
Cleaner than an estimated 70% of websites analyzed. This page meets the Web Sustainability Guidelines target.
Info::
Estimated 30th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
0.41g
30th percentile
Cleaner than 70% of websites
✓ Below the Web Sustainability Guidelines target
vs Median 32% cleaner ✓
vs Target 19% cleaner ✓
Image Optimization14 images, 100 KB total, 0 KB wastedINFO
Image Optimization
14 images, 100 KB total, 0 KB wasted
Image Optimization Audit
Total Images
14
Total Size
100 KB
9 missing dimensions 2 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.