Sustainability

· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.

SCORE

GRADE

FIX

REVIEW

PASS

INFO

Device:

Mobile Desktop

Checks

2 PASS 2 REVIEW 3 FIX

CO2 Per Page Load

Action

1.80g CO2 per view

FIX

1.80g CO2 per view

1.80g CO2 per page view

This page transfers 6.3 MB, producing an estimated 1.80g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.33g, network 0.31g, end-user device 1.15g.

Got: 1.80g CO2 Expected: < 0.50g (sustainability target)

At 10,000 monthly views: 215.5 kg CO2/year

With 10,000 page views per month, this page would generate approximately 215.5 kg of CO2 annually — equivalent to charging 26936 smartphones.

1.80g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 16% of websites

Sustainable Web Design model v4 · Page size: 6.3 MB

Your site

1.80g

Top 10%

0.20g

Target

0.50g

Median website

0.60g

Energy Breakdown

Data center

0.33g

Network

0.31g

End-user device

1.15g

At 10,000 monthly views: Monthly: 18.0 kg · Annual: 215.5 kg · ≈ 26936 smartphone charges

Green Hosting

Action

Not green

FIX

Not green

No confirmed renewable energy commitment detected

Consider providers like Cloudflare, Google Cloud, or Vercel that match 100% of their energy use with renewables.

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 Not identified✗CDN Shopify✗

Based on known provider commitments. Verify at thegreenwebfoundation.org

Carbon Budget

Action

84th percentile

FIX

84th percentile

1.80g CO2 — above the median website (0.60g)

Heavier than an estimated 16% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.

Estimated 84th percentile

Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.

Top 10%

Target

Median website

1.80g

84th percentile

Cleaner than 16% of websites

✗ Above the median website

vs Median 199% more

vs Target 259% more

Transfer Efficiency

80% efficient

REVIEW

80% efficient

Transfer efficiency: 80%

An estimated 1322 KB (20%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 1322 KB of unused JavaScript. This wasted data produces 0.37g of unnecessary CO2 per page view.

Total waste: 1322 KB (20% of page weight)

Unused JS 1322 KB

0.37g unnecessary CO2 per visit

Actual transfer 6493 KB

Theoretical minimum 5170 KB

Potential savings 1322 KB (0.37g CO2)

See Deep Analysis sections above for specific optimizations.

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

97% reduction on repeat visits

Returning visitors download only 199 KB (vs 6493 KB first visit). 288 of 289 resources are served from browser cache, saving 1.74g CO2 per repeat visit.

Repeat visit: 0.06g CO2 (first visit: 1.80g)

First visit

6493 KB

Repeat visit

199 KB

97% reduction on repeat visits

Saving 1.74g CO2 per returning visitor

288 resources served from cache · 1 resources re-downloaded

A+

Web Font Weight Variants

3 font weights loaded across 1 famil(y/ies) -- reasonable

PASS

3 font weights loaded across 1 famil(y/ies) -- reasonable

3 font weight(s) loaded across 1 famil(y/ies)

Image Optimization

15 images, 0 KB total, 0 KB wasted

INFO

Image Optimization Audit

Total Images

Total Size

0 KB

11 missing dimensions 3 missing lazy loading

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