https://zippia.com
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
3
PASS
2
INFO
0
Checks
62 PASS 3 REVIEW 1 FIX
DTransfer EfficiencyAction58% efficientFIX
Transfer Efficiency
Action58% efficient
58% efficient
Warning::
Transfer efficiency: 58%
An estimated 913 KB (42%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 913 KB of unused JavaScript. This wasted data produces 0.21g of unnecessary CO2 per page view.
Total waste: 913 KB (42% of page weight)
Unused JS 913 KB
0.21g unnecessary CO2 per visit
Actual transfer 2168 KB
Theoretical minimum 1254 KB
Potential savings 913 KB (0.21g CO2)
See Deep Analysis sections above for specific optimizations.
BCO2 Per Page Load0.50g CO2 per viewREVIEW
CO2 Per Page Load
0.50g CO2 per view
0.50g CO2 per view
Info::
0.50g CO2 per page view
This page transfers 2.1 MB, producing an estimated 0.50g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.01g, network 0.10g, end-user device 0.38g.
Got: 0.50g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 60.1 kg CO2/year
With 10,000 page views per month, this page would generate approximately 60.1 kg of CO2 annually — equivalent to charging 7516 smartphones.
Info::
Green hosting reduces data center emissions
0.50g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 60% of websites
Sustainable Web Design model v4 · Page size: 2.1 MB
Your site
0.50g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.01g
Network
0.10g
End-user device
0.38g
At 10,000 monthly views: Monthly: 5.0 kg · Annual: 60.1 kg · ≈ 7516 smartphone charges
BGreen HostingGreen (hosting)REVIEW
Green Hosting
Green (hosting)
Green (hosting)
Info::
Next.js uses renewable energy
Info::
Next.js: Verified by the Green Web Foundation
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 Next.js✓CDN Not identified✗
Next.js: Verified by the Green Web Foundation
Based on known provider commitments. Verify at thegreenwebfoundation.org
BCarbon Budget40th percentileREVIEW
Carbon Budget
40th percentile
40th percentile
Info::
0.50g CO2 — below the median website (0.60g)
Better than an estimated 60% of websites, but above the sustainability target of 0.50g. Reducing page weight would help reach the target.
Info::
Estimated 40th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
0.50g
40th percentile
Cleaner than 60% of websites
✗ Above the median website
vs Median 16% cleaner ✓
vs Target 0% more
A+Repeat Visit Weight99% cachedPASS
Repeat Visit Weight
99% cached
99% cached
Info::
99% reduction on repeat visits
Returning visitors download only 25 KB (vs 2168 KB first visit). 86 of 87 resources are served from browser cache, saving 0.50g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 0.50g)
First visit
2168 KB
Repeat visit
25 KB
99% reduction on repeat visits
Saving 0.50g CO2 per returning visitor
86 resources served from cache · 1 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: Google Cloud
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.