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https://stripe.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
4
PASS
1
INFO
0
Device:
Mobile Desktop
Checks
6
1 PASS 4 REVIEW 1 FIX
D
Green Hosting
Action
Not green
FIX
Not green
Info::
No confirmed renewable energy commitment detected
Consider providers like Cloudflare, Google Cloud, or Vercel that match 100% of their energy use with renewables.
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 HostingNot Green Hosted
Hosting Amazon Web Services✗CDN Not identified✗

Based on known provider commitments. Verify at thegreenwebfoundation.org

B
CO2 Per Page Load
0.51g CO2 per view
REVIEW
0.51g CO2 per view
Info::
0.51g CO2 per page view
This page transfers 1.8 MB, producing an estimated 0.51g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.09g, network 0.09g, end-user device 0.33g.
Got: 0.51g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 61.4 kg CO2/year
With 10,000 page views per month, this page would generate approximately 61.4 kg of CO2 annually — equivalent to charging 7674 smartphones.

0.51g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 59% of websites

Sustainable Web Design model v4 · Page size: 1.8 MB

Your site
0.51g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.09g
Network
0.09g
End-user device
0.33g
At 10,000 monthly views: Monthly: 5.1 kg · Annual: 61.4 kg · ≈ 7674 smartphone charges
B
Carbon Budget
41th percentile
REVIEW
41th percentile
Info::
0.51g CO2 — below the median website (0.60g)
Better than an estimated 59% of websites, but above the sustainability target of 0.50g. Reducing page weight would help reach the target.
Info::
Estimated 41th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website

0.51g

41st percentile

Cleaner than 59% of websites

✗ Above the median website

vs Median 15% cleaner ✓
vs Target 2% more
B
Transfer Efficiency
88% efficient
REVIEW
88% efficient
Info::
Transfer efficiency: 88%
An estimated 226 KB (12%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 226 KB of unused JavaScript. This wasted data produces 0.06g of unnecessary CO2 per page view.
88% efficient

Total waste: 226 KB (12% of page weight)

Unused JS 226 KB

0.06g unnecessary CO2 per visit

Actual transfer 1850 KB
Theoretical minimum 1623 KB
Potential savings 226 KB (0.06g CO2)

See Deep Analysis sections above for specific optimizations.

C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Repeat Visit Weight
91% cached
PASS
91% cached
Info::
91% reduction on repeat visits
Returning visitors download only 169 KB (vs 1850 KB first visit). 112 of 115 resources are served from browser cache, saving 0.46g CO2 per repeat visit.
Info::
Repeat visit: 0.05g CO2 (first visit: 0.51g)
First visit
1850 KB
Repeat visit
169 KB

91% reduction on repeat visits

Saving 0.46g CO2 per returning visitor

112 resources served from cache · 3 resources re-downloaded

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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