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

2.29g CO2 per view

FIX

2.29g CO2 per view

2.29g CO2 per page view

This page transfers 8.1 MB, producing an estimated 2.29g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.42g, network 0.40g, end-user device 1.47g.

Got: 2.29g CO2 Expected: < 0.50g (sustainability target)

At 10,000 monthly views: 274.3 kg CO2/year

With 10,000 page views per month, this page would generate approximately 274.3 kg of CO2 annually — equivalent to charging 34291 smartphones.

2.29g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 5% of websites

Sustainable Web Design model v4 · Page size: 8.1 MB

Your site

2.29g

Top 10%

0.20g

Target

0.50g

Median website

0.60g

Energy Breakdown

Data center

0.42g

Network

0.40g

End-user device

1.47g

At 10,000 monthly views: Monthly: 22.9 kg · Annual: 274.3 kg · ≈ 34291 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 Apache HTTP Server✗CDN Not identified✗

Based on known provider commitments. Verify at thegreenwebfoundation.org

Carbon Budget

Action

95th percentile

FIX

95th percentile

2.29g CO2 — above the median website (0.60g)

Heavier than an estimated 5% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.

Estimated 95th percentile

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

Top 10%

Target

Median website

2.29g

95th percentile

Cleaner than 5% of websites

✗ Above the median website

vs Median 281% more

vs Target 357% more

Web Font Weight Variants

Action

10 font weights loaded across 2 famil(y/ies)

REVIEW

10 font weights loaded across 2 famil(y/ies)

10 font weights loaded -- likely 100+ KB of unused payload

Loading 10 font weights typically transfers 200-400 KB just for fonts. Most pages legitimately use 2-3 weights (regular + bold, maybe medium). Audit which weights your stylesheet actually applies and trim the Google Fonts URL accordingly. Affected families: Cormorant Garamond, Inter.

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 21 KB (vs 8266 KB first visit). 18 of 19 resources are served from browser cache, saving 2.28g CO2 per repeat visit.

Repeat visit: 0.01g CO2 (first visit: 2.29g)

First visit

8266 KB

Repeat visit

21 KB

100% reduction on repeat visits

Saving 2.28g CO2 per returning visitor

18 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 8266 KB

Theoretical minimum 8266 KB

See Deep Analysis sections above for specific optimizations.

Image Optimization

17 images, 8038 KB total, 3863 KB wasted

INFO

Image Optimization Audit

Total Images

Total Size

8038 KB

Oversized

Wasted

3863 KB

13 missing alt text 17 missing dimensions 15 missing lazy loading

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