https://amazon.com
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
62
GRADE
D
FIX
3
REVIEW
2
PASS
2
INFO
1
Checks
82 PASS 2 REVIEW 3 FIX
FCO2 Per Page LoadAction2.18g CO2 per viewFIX
CO2 Per Page Load
Action2.18g CO2 per view
2.18g CO2 per view
Critical::
2.18g CO2 per page view
This page transfers 7.7 MB, producing an estimated 2.18g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.40g, network 0.38g, end-user device 1.40g.
Got: 2.18g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 262.0 kg CO2/year
With 10,000 page views per month, this page would generate approximately 262.0 kg of CO2 annually — equivalent to charging 32747 smartphones.
2.18g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 5% of websites
Sustainable Web Design model v4 · Page size: 7.7 MB
Your site
2.18g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.40g
Network
0.38g
End-user device
1.40g
At 10,000 monthly views: Monthly: 21.8 kg · Annual: 262.0 kg · ≈ 32747 smartphone charges
DGreen HostingActionNot greenFIX
Green Hosting
ActionNot green
Not green
Info::
No confirmed renewable energy commitment detected
Consider providers like Cloudflare, Google Cloud, or Vercel that match 100% of their energy use with renewables.
Info::
AWS: Renewable energy varies by region; committed to 100% by 2025
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 HostingNot Green Hosted
Hosting AWS✗CDN Not identified✗
AWS: Renewable energy varies by region; committed to 100% by 2025
Based on known provider commitments. Verify at thegreenwebfoundation.org
FCarbon BudgetAction95th percentileFIX
Carbon Budget
Action95th percentile
95th percentile
Warning::
2.18g 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
2.18g
95th percentile
Cleaner than 5% of websites
✗ Above the median website
vs Median 264% more
vs Target 337% 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 Weight96% cachedPASS
Repeat Visit Weight
96% cached
96% cached
Info::
96% reduction on repeat visits
Returning visitors download only 338 KB (vs 7893 KB first visit). 190 of 193 resources are served from browser cache, saving 2.09g CO2 per repeat visit.
Info::
Repeat visit: 0.09g CO2 (first visit: 2.18g)
First visit
7893 KB
Repeat visit
338 KB
96% reduction on repeat visits
Saving 2.09g CO2 per returning visitor
190 resources served from cache · 3 resources re-downloaded
A+Transfer Efficiency92% efficientPASS
Transfer Efficiency
92% efficient
92% efficient
Info::
Transfer efficiency: 92%
Only 592 KB of potential savings identified. Your page is well-optimized for size.
Total waste: 592 KB (8% of page weight)
Unused JS 592 KB
0.16g unnecessary CO2 per visit
Actual transfer 7893 KB
Theoretical minimum 7301 KB
Potential savings 592 KB (0.16g CO2)
See Deep Analysis sections above for specific optimizations.
Image Optimization200 images, 311 KB total, 0 KB wastedINFO
Image Optimization
200 images, 311 KB total, 0 KB wasted
Image Optimization Audit
Total Images
200
Total Size
311 KB
199 missing dimensions 193 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.