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 3 REVIEW

Carbon Budget

34th percentile

REVIEW

34th percentile

0.45g CO2 — below the sustainability target of 0.50g

Cleaner than an estimated 66% of websites analyzed. This page meets the Web Sustainability Guidelines target.

Estimated 34th percentile

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

Top 10%

Target

Median website

0.45g

34th percentile

Cleaner than 66% of websites

✓ Below the Web Sustainability Guidelines target

vs Median 25% cleaner ✓

vs Target 10% cleaner ✓

Transfer Efficiency

90% efficient

REVIEW

90% efficient

Transfer efficiency: 90%

An estimated 201 KB (10%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 201 KB of unused JavaScript. This wasted data produces 0.05g of unnecessary CO2 per page view.

Total waste: 201 KB (10% of page weight)

Unused JS 201 KB

0.05g unnecessary CO2 per visit

Actual transfer 1946 KB

Theoretical minimum 1745 KB

Potential savings 201 KB (0.05g 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

CO2 Per Page Load

0.45g CO2 per view

PASS

0.45g CO2 per view

0.45g CO2 per page view

This page transfers 1.9 MB, producing an estimated 0.45g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.01g, network 0.09g, end-user device 0.35g.

Got: 0.45g CO2 Expected: < 0.50g (sustainability target)

At 10,000 monthly views: 54.0 kg CO2/year

With 10,000 page views per month, this page would generate approximately 54.0 kg of CO2 annually — equivalent to charging 6749 smartphones.

Green hosting reduces data center emissions

0.45g

Carbon Footprint per page view

✓ Below sustainability target (0.50g)

Cleaner than 66% of websites

Sustainable Web Design model v4 · Page size: 1.9 MB

Your site

0.45g

Top 10%

0.20g

Target

0.50g

Median website

0.60g

Energy Breakdown

Data center

0.01g

Network

0.09g

End-user device

0.35g

At 10,000 monthly views: Monthly: 4.5 kg · Annual: 54.0 kg · ≈ 6749 smartphone charges

Green Hosting

Green (cdn)

PASS

Green (cdn)

Vercel CDN uses renewable energy

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

Vercel: Hosted on AWS/Google Cloud with renewable energy commitments

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 Vercel✓

Vercel: Hosted on AWS/Google Cloud with renewable energy commitments

Based on known provider commitments. Verify at thegreenwebfoundation.org

A+

Repeat Visit Weight

100% cached

PASS

100% cached

100% reduction on repeat visits

Returning visitors download only 1 KB (vs 1946 KB first visit). 46 of 47 resources are served from browser cache, saving 0.45g CO2 per repeat visit.

Repeat visit: 0.00g CO2 (first visit: 0.45g)

First visit

1946 KB

Repeat visit

1 KB

100% reduction on repeat visits

Saving 0.45g CO2 per returning visitor

46 resources served from cache · 1 resources re-downloaded

A+

Web Font Weight Variants

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

PASS

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

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

Image Optimization

8 images, 1831 KB total, 900 KB wasted

INFO

Image Optimization Audit

Total Images

Total Size

1831 KB

Oversized

Wasted

900 KB

4 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.