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 2 REVIEW 2 FIX

CO2 Per Page Load

Action

1.32g CO2 per view

FIX

1.32g CO2 per view

1.32g CO2 per page view

This page transfers 5.6 MB, producing an estimated 1.32g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.03g, network 0.27g, end-user device 1.01g.

Got: 1.32g CO2 Expected: < 0.50g (sustainability target)

At 10,000 monthly views: 158.1 kg CO2/year

With 10,000 page views per month, this page would generate approximately 158.1 kg of CO2 annually — equivalent to charging 19763 smartphones.

Green hosting reduces data center emissions

1.32g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 30% of websites

Sustainable Web Design model v4 · Page size: 5.6 MB

Your site

1.32g

Top 10%

0.20g

Target

0.50g

Median website

0.60g

Energy Breakdown

Data center

0.03g

Network

0.27g

End-user device

1.01g

At 10,000 monthly views: Monthly: 13.2 kg · Annual: 158.1 kg · ≈ 19763 smartphone charges

Carbon Budget

Action

70th percentile

FIX

70th percentile

1.32g CO2 — above the median website (0.60g)

Heavier than an estimated 30% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.

Estimated 70th percentile

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

Top 10%

Target

Median website

1.32g

70th percentile

Cleaner than 30% of websites

✗ Above the median website

vs Median 120% more

vs Target 164% more

Transfer Efficiency

86% efficient

REVIEW

86% efficient

Transfer efficiency: 86%

An estimated 779 KB (14%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 779 KB of unused JavaScript. This wasted data produces 0.18g of unnecessary CO2 per page view.

Total waste: 779 KB (14% of page weight)

Unused JS 779 KB

0.18g unnecessary CO2 per visit

Actual transfer 5700 KB

Theoretical minimum 4921 KB

Potential savings 779 KB (0.18g CO2)

See Deep Analysis sections above for specific optimizations.

Green Hosting

Action

Whether the site is served from green-energy infrastructure

REVIEW

Green Hosting

No green hosting detected

Green Hosting

Green (cdn)

PASS

Green (cdn)

Cloudflare CDN uses renewable energy

Since most traffic is served through the CDN, the majority of data transfer energy is renewable.

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 GoDaddy✗CDN Cloudflare✓

Cloudflare: 100% renewable energy for global network since 2019

Based on known provider commitments. Verify at thegreenwebfoundation.org

A+

Repeat Visit Weight

98% cached

PASS

98% cached

98% reduction on repeat visits

Returning visitors download only 101 KB (vs 5700 KB first visit). 386 of 389 resources are served from browser cache, saving 1.29g CO2 per repeat visit.

Repeat visit: 0.02g CO2 (first visit: 1.32g)

First visit

5700 KB

Repeat visit

101 KB

98% reduction on repeat visits

Saving 1.29g CO2 per returning visitor

386 resources served from cache · 3 resources re-downloaded

A+

Web Font Weight Variants

3 font weights loaded across 1 famil(y/ies) -- reasonable

PASS

3 font weights loaded across 1 famil(y/ies) -- reasonable

3 font weight(s) loaded across 1 famil(y/ies)

Image Optimization

96 images, 649 KB total, 59 KB wasted

INFO

Image Optimization Audit

Total Images

Total Size

649 KB

Oversized

Wasted

59 KB

2 missing lazy loading

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