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

1.80g CO2 per view

FIX

1.80g CO2 per view

1.80g CO2 per page view

This page transfers 7.6 MB, producing an estimated 1.80g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.05g, network 0.37g, end-user device 1.38g.

Got: 1.80g CO2 Expected: < 0.50g (sustainability target)

At 10,000 monthly views: 216.2 kg CO2/year

With 10,000 page views per month, this page would generate approximately 216.2 kg of CO2 annually — equivalent to charging 27027 smartphones.

Green hosting reduces data center emissions

1.80g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 16% of websites

Sustainable Web Design model v4 · Page size: 7.6 MB

Your site

1.80g

Top 10%

0.20g

Target

0.50g

Median website

0.60g

Energy Breakdown

Data center

0.05g

Network

0.37g

End-user device

1.38g

At 10,000 monthly views: Monthly: 18.0 kg · Annual: 216.2 kg · ≈ 27027 smartphone charges

Carbon Budget

Action

84th percentile

FIX

84th percentile

1.80g CO2 — above the median website (0.60g)

Heavier than an estimated 16% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.

Estimated 84th percentile

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

Top 10%

Target

Median website

1.80g

84th percentile

Cleaner than 16% of websites

✗ Above the median website

vs Median 200% more

vs Target 260% 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

87% efficient

REVIEW

87% efficient

Transfer efficiency: 87%

An estimated 1032 KB (13%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 1032 KB of unused JavaScript. This wasted data produces 0.24g of unnecessary CO2 per page view.

Total waste: 1032 KB (13% of page weight)

Unused JS 1032 KB

0.24g unnecessary CO2 per visit

Actual transfer 7795 KB

Theoretical minimum 6762 KB

Potential savings 1032 KB (0.24g CO2)

See Deep Analysis sections above for specific optimizations.

Web Font Weight Variants

5 font weights loaded across 4 famil(y/ies)

REVIEW

5 font weights loaded across 4 famil(y/ies)

5 font weights loaded -- review whether all are used

5+ weights for a single page is often more than needed. Compare against the actual font-weight CSS rules in your stylesheets; trim weights that aren't applied to any element. Affected families: Lato, Open Sans, Playfair Display, Source Sans Pro.

A+

Repeat Visit Weight

97% cached

PASS

97% cached

97% reduction on repeat visits

Returning visitors download only 205 KB (vs 7795 KB first visit). 562 of 570 resources are served from browser cache, saving 1.75g CO2 per repeat visit.

Repeat visit: 0.05g CO2 (first visit: 1.80g)

First visit

7795 KB

Repeat visit

205 KB

97% reduction on repeat visits

Saving 1.75g CO2 per returning visitor

562 resources served from cache · 8 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

56 images, 877 KB total, 124 KB wasted

INFO

Image Optimization Audit

Total Images

Total Size

877 KB

Oversized

Wasted

124 KB

4 missing alt text 49 missing dimensions 4 missing lazy loading

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