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

4 PASS 1 REVIEW 2 FIX

CO2 Per Page Load

Action

1.09g CO2 per view

FIX

1.09g CO2 per view

1.09g CO2 per page view

This page transfers 4.6 MB, producing an estimated 1.09g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.03g, network 0.22g, end-user device 0.84g.

Got: 1.09g CO2 Expected: < 0.50g (sustainability target)

At 10,000 monthly views: 130.4 kg CO2/year

With 10,000 page views per month, this page would generate approximately 130.4 kg of CO2 annually — equivalent to charging 16306 smartphones.

Green hosting reduces data center emissions

1.09g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 37% of websites

Sustainable Web Design model v4 · Page size: 4.6 MB

Your site

1.09g

Top 10%

0.20g

Target

0.50g

Median website

0.60g

Energy Breakdown

Data center

0.03g

Network

0.22g

End-user device

0.84g

At 10,000 monthly views: Monthly: 10.9 kg · Annual: 130.4 kg · ≈ 16306 smartphone charges

Carbon Budget

Action

63th percentile

FIX

63th percentile

1.09g CO2 — above the median website (0.60g)

Heavier than an estimated 37% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.

Estimated 63th percentile

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

Top 10%

Target

Median website

1.09g

63rd percentile

Cleaner than 37% of websites

✗ Above the median website

vs Median 81% more

vs Target 117% more

Transfer Efficiency

82% efficient

REVIEW

82% efficient

Transfer efficiency: 82%

An estimated 825 KB (18%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 825 KB of unused JavaScript. This wasted data produces 0.19g of unnecessary CO2 per page view.

Total waste: 825 KB (18% of page weight)

Unused JS 825 KB

0.19g unnecessary CO2 per visit

Actual transfer 4703 KB

Theoretical minimum 3877 KB

Potential savings 825 KB (0.19g CO2)

See Deep Analysis sections above for specific optimizations.

A+

Green Hosting

Green (both)

PASS

Green (both)

Both hosting and CDN use renewable energy

Got: Hosting: Cloudflare, CDN: Cloudflare

Cloudflare: Verified by the Green Web Foundation

Cloudflare: 100% renewable energy for global network since 2019

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 Cloudflare✓

Cloudflare: Verified by the Green Web Foundation

Cloudflare: 100% renewable energy for global network since 2019

Based on known provider commitments. Verify at thegreenwebfoundation.org

A+

Repeat Visit Weight

97% cached

PASS

97% cached

97% reduction on repeat visits

Returning visitors download only 121 KB (vs 4703 KB first visit). 96 of 97 resources are served from browser cache, saving 1.06g CO2 per repeat visit.

Repeat visit: 0.03g CO2 (first visit: 1.09g)

First visit

4703 KB

Repeat visit

121 KB

97% reduction on repeat visits

Saving 1.06g CO2 per returning visitor

96 resources served from cache · 1 resources re-downloaded

A+

Web Font Weight Variants

2 font weights loaded across 2 famil(y/ies) -- reasonable

PASS

2 font weights loaded across 2 famil(y/ies) -- reasonable

2 font weight(s) loaded across 2 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

11 images, 0 KB total, 0 KB wasted

INFO

Image Optimization Audit

Total Images

Total Size

0 KB

Oversized

11 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.