https://vocal.media
Sustainability
· 6 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
72
GRADE
C
FIX
1
REVIEW
2
PASS
3
INFO
0
Checks
63 PASS 2 REVIEW 1 FIX
FTransfer EfficiencyAction27% efficientFIX
Transfer Efficiency
Action27% efficient
27% efficient
Critical::
Transfer efficiency: 27%
An estimated 1972 KB (73%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 1972 KB of unused JavaScript. This wasted data produces 0.46g of unnecessary CO2 per page view.
Total waste: 1972 KB (73% of page weight)
Unused JS 1972 KB
0.46g unnecessary CO2 per visit
Actual transfer 2701 KB
Theoretical minimum 728 KB
Potential savings 1972 KB (0.46g CO2)
See Deep Analysis sections above for specific optimizations.
BCO2 Per Page Load0.62g CO2 per viewREVIEW
CO2 Per Page Load
0.62g CO2 per view
0.62g CO2 per view
Info::
0.62g CO2 per page view
This page transfers 2.6 MB, producing an estimated 0.62g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.02g, network 0.13g, end-user device 0.48g.
Got: 0.62g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 74.9 kg CO2/year
With 10,000 page views per month, this page would generate approximately 74.9 kg of CO2 annually — equivalent to charging 9366 smartphones.
Info::
Green hosting reduces data center emissions
0.62g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 50% of websites
Sustainable Web Design model v4 · Page size: 2.6 MB
Your site
0.62g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.02g
Network
0.13g
End-user device
0.48g
At 10,000 monthly views: Monthly: 6.2 kg · Annual: 74.9 kg · ≈ 9366 smartphone charges
BCarbon Budget50th percentileREVIEW
Carbon Budget
50th percentile
50th percentile
Warning::
0.62g CO2 — above the median website (0.60g)
Heavier than an estimated 50% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 50th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
0.62g
50th percentile
Cleaner than 50% of websites
✗ Above the median website
vs Median 4% more
vs Target 25% more
A+Green HostingGreen (both)PASS
Green Hosting
Green (both)
Green (both)
Info::
Both hosting and CDN use renewable energy
Got: Hosting: Amazon Web Services, CDN: Cloudflare
Info::
Amazon Web Services: Verified by the Green Web Foundation
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 Amazon Web Services✓CDN Cloudflare✓
Amazon Web Services: Verified by the Green Web Foundation
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 32 KB (vs 2701 KB first visit). 228 of 232 resources are served from browser cache, saving 0.62g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 0.62g)
First visit
2701 KB
Repeat visit
32 KB
99% reduction on repeat visits
Saving 0.62g CO2 per returning visitor
228 resources served from cache · 4 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.