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 4 REVIEW

CO2 Per Page Load

0.59g CO2 per view

REVIEW

0.59g CO2 per view

0.59g CO2 per page view

This page transfers 2.5 MB, producing an estimated 0.59g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.01g, network 0.12g, end-user device 0.45g.

Got: 0.59g CO2 Expected: < 0.50g (sustainability target)

At 10,000 monthly views: 70.4 kg CO2/year

With 10,000 page views per month, this page would generate approximately 70.4 kg of CO2 annually — equivalent to charging 8801 smartphones.

Green hosting reduces data center emissions

0.59g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 52% of websites

Sustainable Web Design model v4 · Page size: 2.5 MB

Your site

0.59g

Top 10%

0.20g

Target

0.50g

Median website

0.60g

Energy Breakdown

Data center

0.01g

Network

0.12g

End-user device

0.45g

At 10,000 monthly views: Monthly: 5.9 kg · Annual: 70.4 kg · ≈ 8801 smartphone charges

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

Carbon Budget

48th percentile

REVIEW

48th percentile

0.59g CO2 — below the median website (0.60g)

Better than an estimated 52% of websites, but above the sustainability target of 0.50g. Reducing page weight would help reach the target.

Estimated 48th percentile

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

Top 10%

Target

Median website

0.59g

48th percentile

Cleaner than 52% of websites

✗ Above the median website

vs Median 2% cleaner ✓

vs Target 17% more

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 81 KB (vs 2538 KB first visit). 299 of 304 resources are served from browser cache, saving 0.57g CO2 per repeat visit.

Repeat visit: 0.02g CO2 (first visit: 0.59g)

First visit

2538 KB

Repeat visit

81 KB

97% reduction on repeat visits

Saving 0.57g CO2 per returning visitor

299 resources served from cache · 5 resources re-downloaded

A+

Transfer Efficiency

96% efficient

PASS

96% efficient

Transfer efficiency: 96%

Only 103 KB of potential savings identified. Your page is well-optimized for size.

Total waste: 103 KB (4% of page weight)

Unused JS 103 KB

0.02g unnecessary CO2 per visit

Actual transfer 2538 KB

Theoretical minimum 2435 KB

Potential savings 103 KB (0.02g CO2)

See Deep Analysis sections above for specific optimizations.

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

18 images, 458 KB total, 137 KB wasted

INFO

Image Optimization Audit

Total Images

Total Size

458 KB

Oversized

Wasted

137 KB

6 missing lazy loading

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