Sustainability

· 6 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 2 REVIEW 2 FIX

CO2 Per Page Load

Action

0.88g CO2 per view

FIX

0.88g CO2 per view

0.88g CO2 per page view

This page transfers 3.7 MB, producing an estimated 0.88g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.02g, network 0.18g, end-user device 0.68g.

Got: 0.88g CO2 Expected: < 0.50g (sustainability target)

At 10,000 monthly views: 105.8 kg CO2/year

With 10,000 page views per month, this page would generate approximately 105.8 kg of CO2 annually — equivalent to charging 13219 smartphones.

Green hosting reduces data center emissions

0.88g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 42% of websites

Sustainable Web Design model v4 · Page size: 3.7 MB

Your site

0.88g

Top 10%

0.20g

Target

0.50g

Median website

0.60g

Energy Breakdown

Data center

0.02g

Network

0.18g

End-user device

0.68g

At 10,000 monthly views: Monthly: 8.8 kg · Annual: 105.8 kg · ≈ 13219 smartphone charges

Carbon Budget

Action

58th percentile

FIX

58th percentile

0.88g CO2 — above the median website (0.60g)

Heavier than an estimated 42% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.

Estimated 58th percentile

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

Top 10%

Target

Median website

0.88g

58th percentile

Cleaner than 42% of websites

✗ Above the median website

vs Median 47% more

vs Target 76% more

Transfer Efficiency

86% efficient

REVIEW

86% efficient

Transfer efficiency: 86%

An estimated 531 KB (14%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 531 KB of unused JavaScript. This wasted data produces 0.12g of unnecessary CO2 per page view.

Total waste: 531 KB (14% of page weight)

Unused JS 531 KB

0.12g unnecessary CO2 per visit

Actual transfer 3812 KB

Theoretical minimum 3281 KB

Potential savings 531 KB (0.12g 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 Not identified✗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 65 KB (vs 3812 KB first visit). 304 of 309 resources are served from browser cache, saving 0.87g CO2 per repeat visit.

Repeat visit: 0.02g CO2 (first visit: 0.88g)

First visit

3812 KB

Repeat visit

65 KB

98% reduction on repeat visits

Saving 0.87g CO2 per returning visitor

304 resources served from cache · 5 resources re-downloaded

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