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 3 REVIEW 2 FIX

CO2 Per Page Load

Action

1.27g CO2 per view

FIX

1.27g CO2 per view

1.27g CO2 per page view

This page transfers 5.4 MB, producing an estimated 1.27g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.03g, network 0.26g, end-user device 0.98g.

Got: 1.27g CO2 Expected: < 0.50g (sustainability target)

At 10,000 monthly views: 152.6 kg CO2/year

With 10,000 page views per month, this page would generate approximately 152.6 kg of CO2 annually — equivalent to charging 19076 smartphones.

Green hosting reduces data center emissions

1.27g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 31% of websites

Sustainable Web Design model v4 · Page size: 5.4 MB

Your site

1.27g

Top 10%

0.20g

Target

0.50g

Median website

0.60g

Energy Breakdown

Data center

0.03g

Network

0.26g

End-user device

0.98g

At 10,000 monthly views: Monthly: 12.7 kg · Annual: 152.6 kg · ≈ 19076 smartphone charges

Carbon Budget

Action

69th percentile

FIX

69th percentile

1.27g CO2 — above the median website (0.60g)

Heavier than an estimated 31% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.

Estimated 69th percentile

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

Top 10%

Target

Median website

1.27g

69th percentile

Cleaner than 31% of websites

✗ Above the median website

vs Median 112% more

vs Target 154% 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

89% efficient

REVIEW

89% efficient

Transfer efficiency: 89%

An estimated 581 KB (11%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 581 KB of unused JavaScript. This wasted data produces 0.13g of unnecessary CO2 per page view.

Total waste: 581 KB (11% of page weight)

Unused JS 581 KB

0.13g unnecessary CO2 per visit

Actual transfer 5502 KB

Theoretical minimum 4920 KB

Potential savings 581 KB (0.13g CO2)

See Deep Analysis sections above for specific optimizations.

Web Font Weight Variants

No detectable Google Fonts weights

REVIEW

No detectable Google Fonts weights

The analyzer detects font weights via Google Fonts URL parameters (~70% of font-using sites). Self-hosted fonts and non-Google CDN fonts aren't visible to URL-based detection. If you self-host fonts, manually audit how many @font-face weights you ship -- 2-3 weights per family is typically enough; 5+ is usually unused payload.

A+

Repeat Visit Weight

97% cached

PASS

97% cached

97% reduction on repeat visits

Returning visitors download only 148 KB (vs 5502 KB first visit). 469 of 473 resources are served from browser cache, saving 1.24g CO2 per repeat visit.

Repeat visit: 0.03g CO2 (first visit: 1.27g)

First visit

5502 KB

Repeat visit

148 KB

97% reduction on repeat visits

Saving 1.24g CO2 per returning visitor

469 resources served from cache · 4 resources re-downloaded

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

94 images, 409 KB total, 0 KB wasted

INFO

Image Optimization Audit

Total Images

Total Size

409 KB

1 missing dimensions 26 missing lazy loading

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