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

4 PASS 2 FIX

CO2 Per Page Load

Action

1.49g CO2 per view

FIX

1.49g CO2 per view

1.49g CO2 per page view

This page transfers 6.3 MB, producing an estimated 1.49g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.04g, network 0.31g, end-user device 1.15g.

Got: 1.49g CO2 Expected: < 0.50g (sustainability target)

At 10,000 monthly views: 179.1 kg CO2/year

With 10,000 page views per month, this page would generate approximately 179.1 kg of CO2 annually — equivalent to charging 22391 smartphones.

Green hosting reduces data center emissions

1.49g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 25% of websites

Sustainable Web Design model v4 · Page size: 6.3 MB

Your site

1.49g

Top 10%

0.20g

Target

0.50g

Median website

0.60g

Energy Breakdown

Data center

0.04g

Network

0.31g

End-user device

1.15g

At 10,000 monthly views: Monthly: 14.9 kg · Annual: 179.1 kg · ≈ 22391 smartphone charges

Carbon Budget

Action

75th percentile

FIX

75th percentile

1.49g CO2 — above the median website (0.60g)

Heavier than an estimated 25% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.

Estimated 75th percentile

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

Top 10%

Target

Median website

1.49g

75th percentile

Cleaner than 25% of websites

✗ Above the median website

vs Median 149% more

vs Target 199% more

A+

Green Hosting

Green (both)

PASS

Green (both)

Both hosting and CDN use renewable energy

Got: Hosting: Next.js, CDN: Cloudflare

Next.js: 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 Next.js✓CDN Cloudflare✓

Next.js: 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

96% cached

PASS

96% cached

96% reduction on repeat visits

Returning visitors download only 268 KB (vs 6458 KB first visit). 134 of 139 resources are served from browser cache, saving 1.43g CO2 per repeat visit.

Repeat visit: 0.06g CO2 (first visit: 1.49g)

First visit

6458 KB

Repeat visit

268 KB

96% reduction on repeat visits

Saving 1.43g CO2 per returning visitor

134 resources served from cache · 5 resources re-downloaded

A+

Transfer Efficiency

92% efficient

PASS

92% efficient

Transfer efficiency: 92%

Only 528 KB of potential savings identified. Your page is well-optimized for size.

Total waste: 528 KB (8% of page weight)

Unused JS 528 KB

0.12g unnecessary CO2 per visit

Actual transfer 6458 KB

Theoretical minimum 5930 KB

Potential savings 528 KB (0.12g CO2)

See Deep Analysis sections above for specific optimizations.

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

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