https://bandcamp.com
Sustainability
· 6 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
76
GRADE
C
FIX
2
REVIEW
1
PASS
3
INFO
0
Checks
63 PASS 1 REVIEW 2 FIX
DCO2 Per Page LoadAction1.01g CO2 per viewFIX
CO2 Per Page Load
Action1.01g CO2 per view
1.01g CO2 per view
Warning::
1.01g CO2 per page view
This page transfers 4.3 MB, producing an estimated 1.01g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.03g, network 0.21g, end-user device 0.77g.
Got: 1.01g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 120.9 kg CO2/year
With 10,000 page views per month, this page would generate approximately 120.9 kg of CO2 annually — equivalent to charging 15112 smartphones.
Info::
Green hosting reduces data center emissions
1.01g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 39% of websites
Sustainable Web Design model v4 · Page size: 4.3 MB
Your site
1.01g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.03g
Network
0.21g
End-user device
0.77g
At 10,000 monthly views: Monthly: 10.1 kg · Annual: 120.9 kg · ≈ 15112 smartphone charges
DCarbon BudgetAction61th percentileFIX
Carbon Budget
Action61th percentile
61th percentile
Warning::
1.01g CO2 — above the median website (0.60g)
Heavier than an estimated 39% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 61th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
1.01g
61st percentile
Cleaner than 39% of websites
✗ Above the median website
vs Median 68% more
vs Target 102% more
BTransfer Efficiency80% efficientREVIEW
Transfer Efficiency
80% efficient
80% efficient
Info::
Transfer efficiency: 80%
An estimated 876 KB (20%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 876 KB of unused JavaScript. This wasted data produces 0.20g of unnecessary CO2 per page view.
Total waste: 876 KB (20% of page weight)
Unused JS 876 KB
0.20g unnecessary CO2 per visit
Actual transfer 4358 KB
Theoretical minimum 3482 KB
Potential savings 876 KB (0.20g CO2)
See Deep Analysis sections above for specific optimizations.
A+Green HostingGreen (both)PASS
Green Hosting
Green (both)
Green (both)
Info::
Both hosting and CDN use renewable energy
Got: Hosting: Axis12 Ltd, CDN: Fastly
Info::
Axis12 Ltd: 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 Axis12 Ltd✓CDN Fastly✓
Axis12 Ltd: 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 Weight99% cachedPASS
Repeat Visit Weight
99% cached
99% cached
Info::
99% reduction on repeat visits
Returning visitors download only 60 KB (vs 4358 KB first visit). 145 of 150 resources are served from browser cache, saving 0.99g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 1.01g)
First visit
4358 KB
Repeat visit
60 KB
99% reduction on repeat visits
Saving 0.99g CO2 per returning visitor
145 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: Axis12 Ltd
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.