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

5 PASS 2 REVIEW

Carbon Budget

31th percentile

REVIEW

31th percentile

0.42g CO2 — below the sustainability target of 0.50g

Cleaner than an estimated 69% of websites analyzed. This page meets the Web Sustainability Guidelines target.

Estimated 31th percentile

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

Top 10%

Target

Median website

0.42g

31st percentile

Cleaner than 69% of websites

✓ Below the Web Sustainability Guidelines target

vs Median 30% cleaner ✓

vs Target 16% cleaner ✓

Green Hosting

Action

Whether the site is served from green-energy infrastructure

REVIEW

Green Hosting

No green hosting detected

CO2 Per Page Load

0.42g CO2 per view

PASS

0.42g CO2 per view

0.42g CO2 per page view

This page transfers 1.8 MB, producing an estimated 0.42g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.01g, network 0.09g, end-user device 0.32g.

Got: 0.42g CO2 Expected: < 0.50g (sustainability target)

At 10,000 monthly views: 50.2 kg CO2/year

With 10,000 page views per month, this page would generate approximately 50.2 kg of CO2 annually — equivalent to charging 6279 smartphones.

Green hosting reduces data center emissions

0.42g

Carbon Footprint per page view

✓ Below sustainability target (0.50g)

Cleaner than 69% of websites

Sustainable Web Design model v4 · Page size: 1.8 MB

Your site

0.42g

Top 10%

0.20g

Target

0.50g

Median website

0.60g

Energy Breakdown

Data center

0.01g

Network

0.09g

End-user device

0.32g

At 10,000 monthly views: Monthly: 4.2 kg · Annual: 50.2 kg · ≈ 6279 smartphone charges

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

99% cached

PASS

99% cached

99% reduction on repeat visits

Returning visitors download only 15 KB (vs 1811 KB first visit). 24 of 25 resources are served from browser cache, saving 0.42g CO2 per repeat visit.

Repeat visit: 0.00g CO2 (first visit: 0.42g)

First visit

1811 KB

Repeat visit

15 KB

99% reduction on repeat visits

Saving 0.42g CO2 per returning visitor

24 resources served from cache · 1 resources re-downloaded

A+

Transfer Efficiency

100% efficient

PASS

100% efficient

Transfer efficiency: 100%

Only 0 KB of potential savings identified. Your page is well-optimized for size.

Actual transfer 1811 KB

Theoretical minimum 1811 KB

See Deep Analysis sections above for specific optimizations.

A+

Web Font Weight Variants

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

PASS

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

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

Image Optimization

12 images, 944 KB total, 472 KB wasted

INFO

Image Optimization Audit

Total Images

Total Size

944 KB

Oversized

Wasted

472 KB

12 missing dimensions 1 missing lazy loading

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