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

1.92g CO2 per view

FIX

1.92g CO2 per view

1.92g CO2 per page view

This page transfers 6.8 MB, producing an estimated 1.92g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.36g, network 0.33g, end-user device 1.23g.

Got: 1.92g CO2 Expected: < 0.50g (sustainability target)

At 10,000 monthly views: 230.8 kg CO2/year

With 10,000 page views per month, this page would generate approximately 230.8 kg of CO2 annually — equivalent to charging 28849 smartphones.

1.92g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 13% of websites

Sustainable Web Design model v4 · Page size: 6.8 MB

Your site

1.92g

Top 10%

0.20g

Target

0.50g

Median website

0.60g

Energy Breakdown

Data center

0.36g

Network

0.33g

End-user device

1.23g

At 10,000 monthly views: Monthly: 19.2 kg · Annual: 230.8 kg · ≈ 28849 smartphone charges

Green Hosting

Action

Unknown

FIX

Unknown

Hosting provider could not be identified

Without knowing the provider, we cannot determine their energy sourcing. Check with your hosting provider about their 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 HostingUnable to Determine

Hosting Not identified✗CDN Not identified✗

Based on known provider commitments. Verify at thegreenwebfoundation.org

Carbon Budget

Action

87th percentile

FIX

87th percentile

1.92g CO2 — above the median website (0.60g)

Heavier than an estimated 13% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.

Estimated 87th percentile

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

Top 10%

Target

Median website

1.92g

87th percentile

Cleaner than 13% of websites

✗ Above the median website

vs Median 221% more

vs Target 285% more

Web Font Weight Variants

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

REVIEW

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

6 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: Poppins.

Green Hosting

Action

Whether the site is served from green-energy infrastructure

REVIEW

Green Hosting

No green hosting detected

A+

Repeat Visit Weight

99% cached

PASS

99% cached

99% reduction on repeat visits

Returning visitors download only 90 KB (vs 6954 KB first visit). 91 of 93 resources are served from browser cache, saving 1.90g CO2 per repeat visit.

Repeat visit: 0.03g CO2 (first visit: 1.92g)

First visit

6954 KB

Repeat visit

90 KB

99% reduction on repeat visits

Saving 1.90g CO2 per returning visitor

91 resources served from cache · 2 resources re-downloaded

A+

Transfer Efficiency

95% efficient

PASS

95% efficient

Transfer efficiency: 95%

Only 351 KB of potential savings identified. Your page is well-optimized for size.

Total waste: 351 KB (5% of page weight)

Unused JS 351 KB

0.10g unnecessary CO2 per visit

Actual transfer 6954 KB

Theoretical minimum 6603 KB

Potential savings 351 KB (0.10g CO2)

See Deep Analysis sections above for specific optimizations.

Image Optimization

114 images, 0 KB total, 0 KB wasted

INFO

Image Optimization Audit

Total Images

114

Total Size

0 KB

Oversized

15 missing dimensions 13 missing lazy loading

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