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

2 PASS 2 REVIEW 3 FIX

CO2 Per Page Load

Action

1.66g CO2 per view

FIX

1.66g CO2 per view

1.66g CO2 per page view

This page transfers 5.9 MB, producing an estimated 1.66g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.31g, network 0.29g, end-user device 1.07g.

Got: 1.66g CO2 Expected: < 0.50g (sustainability target)

At 10,000 monthly views: 199.8 kg CO2/year

With 10,000 page views per month, this page would generate approximately 199.8 kg of CO2 annually — equivalent to charging 24970 smartphones.

1.66g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 20% of websites

Sustainable Web Design model v4 · Page size: 5.9 MB

Your site

1.66g

Top 10%

0.20g

Target

0.50g

Median website

0.60g

Energy Breakdown

Data center

0.31g

Network

0.29g

End-user device

1.07g

At 10,000 monthly views: Monthly: 16.6 kg · Annual: 199.8 kg · ≈ 24970 smartphone charges

Green Hosting

Action

Not green

FIX

Not green

No confirmed renewable energy commitment detected

Consider providers like Cloudflare, Google Cloud, or Vercel that match 100% of their energy use with renewables.

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 HostingNot Green Hosted

Hosting GoDaddy✗CDN Not identified✗

Based on known provider commitments. Verify at thegreenwebfoundation.org

Carbon Budget

Action

80th percentile

FIX

80th percentile

1.66g CO2 — above the median website (0.60g)

Heavier than an estimated 20% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.

Estimated 80th percentile

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

Top 10%

Target

Median website

1.66g

80th percentile

Cleaner than 20% of websites

✗ Above the median website

vs Median 177% more

vs Target 233% more

Web Font Weight Variants

5 font weights loaded across 1 famil(y/ies)

REVIEW

5 font weights loaded across 1 famil(y/ies)

5 font weights loaded -- review whether all are used

5+ weights for a single page is often more than needed. Compare against the actual font-weight CSS rules in your stylesheets; trim weights that aren't applied to any element. Affected families: Roboto.

Green Hosting

Action

Whether the site is served from green-energy infrastructure

REVIEW

Green Hosting

No green hosting detected

A+

Repeat Visit Weight

100% cached

PASS

100% cached

100% reduction on repeat visits

Returning visitors download only 16 KB (vs 6019 KB first visit). 67 of 68 resources are served from browser cache, saving 1.66g CO2 per repeat visit.

Repeat visit: 0.00g CO2 (first visit: 1.66g)

First visit

6019 KB

Repeat visit

16 KB

100% reduction on repeat visits

Saving 1.66g CO2 per returning visitor

67 resources served from cache · 1 resources re-downloaded

A+

Transfer Efficiency

93% efficient

PASS

93% efficient

Transfer efficiency: 93%

Only 430 KB of potential savings identified. Your page is well-optimized for size.

Total waste: 430 KB (7% of page weight)

Unused JS 430 KB

0.12g unnecessary CO2 per visit

Actual transfer 6019 KB

Theoretical minimum 5588 KB

Potential savings 430 KB (0.12g CO2)

See Deep Analysis sections above for specific optimizations.

Image Optimization

3 images, 21 KB total, 0 KB wasted

INFO

Image Optimization Audit

Total Images

Total Size

21 KB

3 missing dimensions

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