https://d-x.capital
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
85
GRADE
B
FIX
0
REVIEW
3
PASS
4
INFO
1
Checks
84 PASS 3 REVIEW
CTransfer EfficiencyAction65% efficientREVIEW
Transfer Efficiency
Action65% efficient
65% efficient
Warning::
Transfer efficiency: 65%
An estimated 200 KB (35%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 200 KB of unused JavaScript. This wasted data produces 0.05g of unnecessary CO2 per page view.
Total waste: 200 KB (35% of page weight)
Unused JS 200 KB
0.05g unnecessary CO2 per visit
Actual transfer 567 KB
Theoretical minimum 367 KB
Potential savings 200 KB (0.05g CO2)
See Deep Analysis sections above for specific optimizations.
CWeb Font Weight VariantsAction10 font weights loaded across 3 famil(y/ies)REVIEW
Web Font Weight Variants
Action10 font weights loaded across 3 famil(y/ies)
10 font weights loaded across 3 famil(y/ies)
Warning::
10 font weights loaded -- likely 100+ KB of unused payload
Loading 10 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, IBM Plex Mono, Inter.
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+CO2 Per Page Load0.13g CO2 per viewPASS
CO2 Per Page Load
0.13g CO2 per view
0.13g CO2 per view
Info::
0.13g CO2 per page view
This page transfers 0.6 MB, producing an estimated 0.13g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.00g, network 0.03g, end-user device 0.10g.
Got: 0.13g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 15.8 kg CO2/year
With 10,000 page views per month, this page would generate approximately 15.8 kg of CO2 annually — equivalent to charging 1968 smartphones.
Info::
Green hosting reduces data center emissions
0.13g
Carbon Footprint per page view
✓ Below sustainability target (0.50g)
Cleaner than 90% of websites
Sustainable Web Design model v4 · Page size: 0.6 MB
Your site
0.13g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.00g
Network
0.03g
End-user device
0.10g
At 10,000 monthly views: Monthly: 1.3 kg · Annual: 15.8 kg · ≈ 1968 smartphone charges
AGreen HostingGreen (cdn)PASS
Green Hosting
Green (cdn)
Green (cdn)
Info::
Cloudflare CDN uses renewable energy
Since most traffic is served through the CDN, the majority of data transfer energy is renewable.
Info::
Cloudflare: 100% renewable energy for global network since 2019
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 Hosting✓ Green Hosted
Hosting Not identified✗CDN Cloudflare✓
Cloudflare: 100% renewable energy for global network since 2019
Based on known provider commitments. Verify at thegreenwebfoundation.org
A+Repeat Visit Weight99% cachedPASS
Repeat Visit Weight
99% cached
99% cached
Info::
99% reduction on repeat visits
Returning visitors download only 7 KB (vs 567 KB first visit). 53 of 54 resources are served from browser cache, saving 0.13g CO2 per repeat visit.
Info::
Repeat visit: 0.00g CO2 (first visit: 0.13g)
First visit
567 KB
Repeat visit
7 KB
99% reduction on repeat visits
Saving 0.13g CO2 per returning visitor
53 resources served from cache · 1 resources re-downloaded
A+Carbon Budget10th percentilePASS
Carbon Budget
10th percentile
10th percentile
Info::
0.13g CO2 — below the sustainability target of 0.50g
Cleaner than an estimated 90% of websites analyzed. This page meets the Web Sustainability Guidelines target.
Info::
Estimated 10th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
0.13g
10th percentile
Cleaner than 90% of websites
✓ Below the Web Sustainability Guidelines target
vs Median 78% cleaner ✓
vs Target 74% cleaner ✓
Image Optimization3 images, 133 KB total, 43 KB wastedINFO
Image Optimization
3 images, 133 KB total, 43 KB wasted
Image Optimization Audit
Total Images
3
Total Size
133 KB
Oversized
1
Wasted
43 KB
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.