https://nabytkar.com
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
66
GRADE
D
FIX
3
REVIEW
3
PASS
1
INFO
1
Checks
81 PASS 3 REVIEW 3 FIX
DCO2 Per Page LoadAction0.84g CO2 per viewFIX
CO2 Per Page Load
Action0.84g CO2 per view
0.84g CO2 per view
Info::
0.84g CO2 per page view
This page transfers 3.0 MB, producing an estimated 0.84g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.16g, network 0.14g, end-user device 0.54g.
Got: 0.84g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 100.6 kg CO2/year
With 10,000 page views per month, this page would generate approximately 100.6 kg of CO2 annually — equivalent to charging 12574 smartphones.
0.84g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 44% of websites
Sustainable Web Design model v4 · Page size: 3.0 MB
Your site
0.84g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.16g
Network
0.14g
End-user device
0.54g
At 10,000 monthly views: Monthly: 8.4 kg · Annual: 100.6 kg · ≈ 12574 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 BudgetAction56th percentileFIX
Carbon Budget
Action56th percentile
56th percentile
Warning::
0.84g CO2 — above the median website (0.60g)
Heavier than an estimated 44% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 56th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
0.84g
56th percentile
Cleaner than 44% of websites
✗ Above the median website
vs Median 40% more
vs Target 68% more
CTransfer EfficiencyAction74% efficientREVIEW
Transfer Efficiency
Action74% efficient
74% efficient
Warning::
Transfer efficiency: 74%
An estimated 785 KB (26%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 785 KB of unused JavaScript. This wasted data produces 0.22g of unnecessary CO2 per page view.
Total waste: 785 KB (26% of page weight)
Unused JS 785 KB
0.22g unnecessary CO2 per visit
Actual transfer 3031 KB
Theoretical minimum 2245 KB
Potential savings 785 KB (0.22g CO2)
See Deep Analysis sections above for specific optimizations.
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 Weight97% cachedPASS
Repeat Visit Weight
97% cached
97% cached
Info::
97% reduction on repeat visits
Returning visitors download only 89 KB (vs 3031 KB first visit). 47 of 48 resources are served from browser cache, saving 0.81g CO2 per repeat visit.
Info::
Repeat visit: 0.02g CO2 (first visit: 0.84g)
First visit
3031 KB
Repeat visit
89 KB
97% reduction on repeat visits
Saving 0.81g CO2 per returning visitor
47 resources served from cache · 1 resources re-downloaded
Image Optimization55 images, 132 KB total, 128 KB wastedINFO
Image Optimization
55 images, 132 KB total, 128 KB wasted
Image Optimization Audit
Total Images
55
Total Size
132 KB
Oversized
12
Wasted
128 KB
4 missing alt text 55 missing dimensions 50 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.