https://shotprep.io
Sustainability
· 6 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
97
GRADE
A+
FIX
0
REVIEW
1
PASS
5
INFO
0
Checks
65 PASS 1 REVIEW
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 Load0.06g CO2 per viewPASS
CO2 Per Page Load
0.06g CO2 per view
0.06g CO2 per view
Info::
0.06g CO2 per page view
This page transfers 0.3 MB, producing an estimated 0.06g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.00g, network 0.01g, end-user device 0.05g.
Got: 0.06g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 7.8 kg CO2/year
With 10,000 page views per month, this page would generate approximately 7.8 kg of CO2 annually — equivalent to charging 968 smartphones.
Info::
Green hosting reduces data center emissions
0.06g
Carbon Footprint per page view
✓ Below sustainability target (0.50g)
Cleaner than 90% of websites
Sustainable Web Design model v4 · Page size: 0.3 MB
Your site
0.06g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.00g
Network
0.01g
End-user device
0.05g
At 10,000 monthly views: Monthly: 0.6 kg · Annual: 7.8 kg · ≈ 968 smartphone charges
AGreen HostingGreen (cdn)PASS
Green Hosting
Green (cdn)
Green (cdn)
Info::
Vercel CDN uses renewable energy
Since most traffic is served through the CDN, the majority of data transfer energy is renewable.
Info::
Vercel: Hosted on AWS/Google Cloud with renewable energy commitments
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 Vercel✓
Vercel: Hosted on AWS/Google Cloud with renewable energy commitments
Based on known provider commitments. Verify at thegreenwebfoundation.org
A+Repeat Visit Weight97% cachedPASS
Repeat Visit Weight
97% cached
97% cached
Info::
97% reduction on repeat visits
Returning visitors download only 9 KB (vs 279 KB first visit). 21 of 22 resources are served from browser cache, saving 0.06g CO2 per repeat visit.
Info::
Repeat visit: 0.00g CO2 (first visit: 0.06g)
First visit
279 KB
Repeat visit
9 KB
97% reduction on repeat visits
Saving 0.06g CO2 per returning visitor
21 resources served from cache · 1 resources re-downloaded
A+Carbon Budget10th percentilePASS
Carbon Budget
10th percentile
10th percentile
Info::
0.06g 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
0.06g
10th percentile
Cleaner than 90% of websites
✓ Below the Web Sustainability Guidelines target
vs Median 89% cleaner ✓
vs Target 87% cleaner ✓
A+Transfer Efficiency90% efficientPASS
Transfer Efficiency
90% efficient
90% efficient
Info::
Transfer efficiency: 90%
Only 27 KB of potential savings identified. Your page is well-optimized for size.
Total waste: 27 KB (10% of page weight)
Unused JS 27 KB
0.01g unnecessary CO2 per visit
Actual transfer 279 KB
Theoretical minimum 252 KB
Potential savings 27 KB (0.01g CO2)
See Deep Analysis sections above for specific optimizations.
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.