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

2.24g CO2 per view

FIX

2.24g CO2 per view

2.24g CO2 per page view

This page transfers 7.9 MB, producing an estimated 2.24g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.41g, network 0.39g, end-user device 1.44g.

Got: 2.24g CO2 Expected: < 0.50g (sustainability target)

At 10,000 monthly views: 268.3 kg CO2/year

With 10,000 page views per month, this page would generate approximately 268.3 kg of CO2 annually — equivalent to charging 33539 smartphones.

2.24g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 5% of websites

Sustainable Web Design model v4 · Page size: 7.9 MB

Your site

2.24g

Top 10%

0.20g

Target

0.50g

Median website

0.60g

Energy Breakdown

Data center

0.41g

Network

0.39g

End-user device

1.44g

At 10,000 monthly views: Monthly: 22.4 kg · Annual: 268.3 kg · ≈ 33539 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

95th percentile

FIX

95th percentile

2.24g 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.

Estimated 95th percentile

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

Top 10%

Target

Median website

2.24g

95th percentile

Cleaner than 5% of websites

✗ Above the median website

vs Median 273% more

vs Target 347% more

Transfer Efficiency

84% efficient

REVIEW

84% efficient

Transfer efficiency: 84%

An estimated 1322 KB (16%) 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 (16% of page weight)

Unused JS 1322 KB

0.37g unnecessary CO2 per visit

Actual transfer 8084 KB

Theoretical minimum 6762 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

98% cached

PASS

98% cached

98% reduction on repeat visits

Returning visitors download only 199 KB (vs 8084 KB first visit). 305 of 306 resources are served from browser cache, saving 2.18g CO2 per repeat visit.

Repeat visit: 0.06g CO2 (first visit: 2.24g)

First visit

8084 KB

Repeat visit

199 KB

98% reduction on repeat visits

Saving 2.18g CO2 per returning visitor

305 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.