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 3 REVIEW 1 FIX

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

38th percentile

REVIEW

38th percentile

0.49g CO2 — below the sustainability target of 0.50g

Cleaner than an estimated 62% of websites analyzed. This page meets the Web Sustainability Guidelines target.

Estimated 38th percentile

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

Top 10%

Target

Median website

0.49g

38th percentile

Cleaner than 62% of websites

✓ Below the Web Sustainability Guidelines target

vs Median 19% cleaner ✓

vs Target 2% cleaner ✓

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.

Green Hosting

Action

Whether the site is served from green-energy infrastructure

REVIEW

Green Hosting

No green hosting detected

CO2 Per Page Load

0.49g CO2 per view

PASS

0.49g CO2 per view

0.49g CO2 per page view

This page transfers 1.7 MB, producing an estimated 0.49g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.09g, network 0.08g, end-user device 0.31g.

Got: 0.49g CO2 Expected: < 0.50g (sustainability target)

At 10,000 monthly views: 58.5 kg CO2/year

With 10,000 page views per month, this page would generate approximately 58.5 kg of CO2 annually — equivalent to charging 7314 smartphones.

0.49g

Carbon Footprint per page view

✓ Below sustainability target (0.50g)

Cleaner than 62% of websites

Sustainable Web Design model v4 · Page size: 1.7 MB

Your site

0.49g

Top 10%

0.20g

Target

0.50g

Median website

0.60g

Energy Breakdown

Data center

0.09g

Network

0.08g

End-user device

0.31g

At 10,000 monthly views: Monthly: 4.9 kg · Annual: 58.5 kg · ≈ 7314 smartphone charges

A+

Repeat Visit Weight

97% cached

PASS

97% cached

97% reduction on repeat visits

Returning visitors download only 46 KB (vs 1763 KB first visit). 283 of 286 resources are served from browser cache, saving 0.47g CO2 per repeat visit.

Repeat visit: 0.01g CO2 (first visit: 0.49g)

First visit

1763 KB

Repeat visit

46 KB

97% reduction on repeat visits

Saving 0.47g CO2 per returning visitor

283 resources served from cache · 3 resources re-downloaded

A+

Transfer Efficiency

98% efficient

PASS

98% efficient

Transfer efficiency: 98%

Only 38 KB of potential savings identified. Your page is well-optimized for size.

Total waste: 38 KB (2% of page weight)

Unused JS 38 KB

0.01g unnecessary CO2 per visit

Actual transfer 1763 KB

Theoretical minimum 1724 KB

Potential savings 38 KB (0.01g CO2)

See Deep Analysis sections above for specific optimizations.

Image Optimization

8 images, 154 KB total, 0 KB wasted

INFO

Image Optimization Audit

Total Images

Total Size

154 KB

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