https://globalsign.com
Sustainability
· 6 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
87
GRADE
B
FIX
0
REVIEW
2
PASS
4
INFO
0
Checks
64 PASS 2 REVIEW
BCarbon Budget31th percentileREVIEW
Carbon Budget
31th percentile
31th percentile
Info::
0.41g CO2 — below the sustainability target of 0.50g
Cleaner than an estimated 69% of websites analyzed. This page meets the Web Sustainability Guidelines target.
Info::
Estimated 31th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
0.41g
31st percentile
Cleaner than 69% of websites
✓ Below the Web Sustainability Guidelines target
vs Median 31% cleaner ✓
vs Target 18% cleaner ✓
BTransfer Efficiency88% efficientREVIEW
Transfer Efficiency
88% efficient
88% efficient
Info::
Transfer efficiency: 88%
An estimated 212 KB (12%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 212 KB of unused JavaScript. This wasted data produces 0.05g of unnecessary CO2 per page view.
Total waste: 212 KB (12% of page weight)
Unused JS 212 KB
0.05g unnecessary CO2 per visit
Actual transfer 1779 KB
Theoretical minimum 1566 KB
Potential savings 212 KB (0.05g CO2)
See Deep Analysis sections above for specific optimizations.
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 1.7 MB, producing an estimated 0.41g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.01g, network 0.09g, end-user device 0.32g.
Got: 0.41g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 49.4 kg CO2/year
With 10,000 page views per month, this page would generate approximately 49.4 kg of CO2 annually — equivalent to charging 6169 smartphones.
Info::
Green hosting reduces data center emissions
0.41g
Carbon Footprint per page view
✓ Below sustainability target (0.50g)
Cleaner than 69% of websites
Sustainable Web Design model v4 · Page size: 1.7 MB
Your site
0.41g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.01g
Network
0.09g
End-user device
0.32g
At 10,000 monthly views: Monthly: 4.1 kg · Annual: 49.4 kg · ≈ 6169 smartphone charges
A+Green HostingGreen (both)PASS
Green Hosting
Green (both)
Green (both)
Info::
Both hosting and CDN use renewable energy
Got: Hosting: Cloudflare, CDN: Fastly
Info::
Cloudflare: Verified by the Green Web Foundation
Info::
Fastly: 100% renewable energy for edge network
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 Cloudflare✓CDN Fastly✓
Cloudflare: Verified by the Green Web Foundation
Fastly: 100% renewable energy for edge network
Based on known provider commitments. Verify at thegreenwebfoundation.org
A+Repeat Visit Weight98% cachedPASS
Repeat Visit Weight
98% cached
98% cached
Info::
98% reduction on repeat visits
Returning visitors download only 27 KB (vs 1779 KB first visit). 111 of 116 resources are served from browser cache, saving 0.40g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 0.41g)
First visit
1779 KB
Repeat visit
27 KB
98% reduction on repeat visits
Saving 0.40g CO2 per returning visitor
111 resources served from cache · 5 resources re-downloaded
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
Whether the site is served from green-energy infrastructure
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.