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https://www.woolly.clothing

Sustainability

· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.
SCORE
60
GRADE
D
FIX
3
REVIEW
2
PASS
2
INFO
1
Device:
Mobile Desktop
Checks
8
2 PASS 2 REVIEW 3 FIX
F
CO2 Per Page Load
Action
2.40g CO2 per view
FIX
2.40g CO2 per view
Critical::
2.40g CO2 per page view
This page transfers 8.5 MB, producing an estimated 2.40g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.44g, network 0.41g, end-user device 1.54g.
Got: 2.40g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 288.0 kg CO2/year
With 10,000 page views per month, this page would generate approximately 288.0 kg of CO2 annually — equivalent to charging 35994 smartphones.

2.40g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 5% of websites

Sustainable Web Design model v4 · Page size: 8.5 MB

Your site
2.40g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.44g
Network
0.41g
End-user device
1.54g
At 10,000 monthly views: Monthly: 24.0 kg · Annual: 288.0 kg · ≈ 35994 smartphone charges
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 Shopify✗

Based on known provider commitments. Verify at thegreenwebfoundation.org

F
Carbon Budget
Action
95th percentile
FIX
95th percentile
Warning::
2.40g CO2 — above the median website (0.60g)
Heavier than an estimated 5% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 95th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website

2.40g

95th percentile

Cleaner than 5% of websites

✗ Above the median website

vs Median 300% more
vs Target 380% more
B
Transfer Efficiency
79% efficient
REVIEW
79% efficient
Info::
Transfer efficiency: 79%
An estimated 1833 KB (21%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 1833 KB of unused JavaScript. This wasted data produces 0.51g of unnecessary CO2 per page view.
79% efficient

Total waste: 1833 KB (21% of page weight)

Unused JS 1833 KB

0.51g unnecessary CO2 per visit

Actual transfer 8676 KB
Theoretical minimum 6843 KB
Potential savings 1833 KB (0.51g 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
97% cached
PASS
97% cached
Info::
97% reduction on repeat visits
Returning visitors download only 246 KB (vs 8676 KB first visit). 639 of 648 resources are served from browser cache, saving 2.33g CO2 per repeat visit.
Info::
Repeat visit: 0.07g CO2 (first visit: 2.40g)
First visit
8676 KB
Repeat visit
246 KB

97% reduction on repeat visits

Saving 2.33g CO2 per returning visitor

639 resources served from cache · 9 resources re-downloaded

A+
Web Font Weight Variants
1 font weights loaded across 1 famil(y/ies) -- reasonable
PASS
1 font weights loaded across 1 famil(y/ies) -- reasonable
Info::
1 font weight(s) loaded across 1 famil(y/ies)
Image Optimization
200 images, 967 KB total, 280 KB wasted
INFO

Image Optimization Audit

Total Images

200

Total Size

967 KB

Oversized

4

Wasted

280 KB

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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