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

3 PASS 2 REVIEW 2 FIX

CO2 Per Page Load

Action

1.48g CO2 per view

FIX

1.48g CO2 per view

1.48g CO2 per page view

This page transfers 6.2 MB, producing an estimated 1.48g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.04g, network 0.31g, end-user device 1.14g.

Got: 1.48g CO2 Expected: < 0.50g (sustainability target)

At 10,000 monthly views: 177.3 kg CO2/year

With 10,000 page views per month, this page would generate approximately 177.3 kg of CO2 annually — equivalent to charging 22167 smartphones.

Green hosting reduces data center emissions

1.48g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 25% of websites

Sustainable Web Design model v4 · Page size: 6.2 MB

Your site

1.48g

Top 10%

0.20g

Target

0.50g

Median website

0.60g

Energy Breakdown

Data center

0.04g

Network

0.31g

End-user device

1.14g

At 10,000 monthly views: Monthly: 14.8 kg · Annual: 177.3 kg · ≈ 22167 smartphone charges

Carbon Budget

Action

75th percentile

FIX

75th percentile

1.48g CO2 — above the median website (0.60g)

Heavier than an estimated 25% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.

Estimated 75th percentile

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

Top 10%

Target

Median website

1.48g

75th percentile

Cleaner than 25% of websites

✗ Above the median website

vs Median 146% more

vs Target 196% more

Green Hosting

Green (hosting)

REVIEW

Green (hosting)

Cloudflare uses renewable energy

Cloudflare: Verified by the Green Web Foundation

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 Cloudflare✓CDN Shopify✗

Cloudflare: Verified by the Green Web Foundation

Based on known provider commitments. Verify at thegreenwebfoundation.org

Transfer Efficiency

86% efficient

REVIEW

86% efficient

Transfer efficiency: 86%

An estimated 876 KB (14%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 876 KB of unused JavaScript. This wasted data produces 0.20g of unnecessary CO2 per page view.

Total waste: 876 KB (14% of page weight)

Unused JS 876 KB

0.20g unnecessary CO2 per visit

Actual transfer 6393 KB

Theoretical minimum 5516 KB

Potential savings 876 KB (0.20g CO2)

See Deep Analysis sections above for specific optimizations.

A+

Repeat Visit Weight

95% cached

PASS

95% cached

95% reduction on repeat visits

Returning visitors download only 302 KB (vs 6393 KB first visit). 636 of 648 resources are served from browser cache, saving 1.41g CO2 per repeat visit.

Repeat visit: 0.07g CO2 (first visit: 1.48g)

First visit

6393 KB

Repeat visit

302 KB

95% reduction on repeat visits

Saving 1.41g CO2 per returning visitor

636 resources served from cache · 12 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)

A+

Green Hosting

Whether the site is served from green-energy infrastructure

PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Cloudflare

Image Optimization

157 images, 448 KB total, 0 KB wasted

INFO

Image Optimization Audit

Total Images

157

Total Size

448 KB

1 missing alt text 7 missing dimensions 8 missing lazy loading

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