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

Web Font Weight Variants

Action

14 font weights loaded across 3 famil(y/ies)

REVIEW

14 font weights loaded across 3 famil(y/ies)

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

Loading 14 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: Geist, Inter, Pacifico.

Green Hosting

Action

Whether the site is served from green-energy infrastructure

REVIEW

Green Hosting

No green hosting detected

A+

CO2 Per Page Load

0.14g CO2 per view

PASS

0.14g CO2 per view

0.14g CO2 per page view

This page transfers 0.6 MB, producing an estimated 0.14g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.00g, network 0.03g, end-user device 0.11g.

Got: 0.14g CO2 Expected: < 0.50g (sustainability target)

At 10,000 monthly views: 17.2 kg CO2/year

With 10,000 page views per month, this page would generate approximately 17.2 kg of CO2 annually — equivalent to charging 2151 smartphones.

Green hosting reduces data center emissions

0.14g

Carbon Footprint per page view

✓ Below sustainability target (0.50g)

Cleaner than 90% of websites

Sustainable Web Design model v4 · Page size: 0.6 MB

Your site

0.14g

Top 10%

0.20g

Target

0.50g

Median website

0.60g

Energy Breakdown

Data center

0.00g

Network

0.03g

End-user device

0.11g

At 10,000 monthly views: Monthly: 1.4 kg · Annual: 17.2 kg · ≈ 2151 smartphone charges

Green Hosting

Green (cdn)

PASS

Green (cdn)

Netlify CDN uses renewable energy

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

Netlify: Hosted on AWS/Google Cloud with renewable energy matching

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 Netlify✓

Netlify: Hosted on AWS/Google Cloud with renewable energy matching

Based on known provider commitments. Verify at thegreenwebfoundation.org

A+

Repeat Visit Weight

98% cached

PASS

98% cached

98% reduction on repeat visits

Returning visitors download only 14 KB (vs 620 KB first visit). 19 of 20 resources are served from browser cache, saving 0.14g CO2 per repeat visit.

Repeat visit: 0.00g CO2 (first visit: 0.14g)

First visit

620 KB

Repeat visit

14 KB

98% reduction on repeat visits

Saving 0.14g CO2 per returning visitor

19 resources served from cache · 1 resources re-downloaded

A+

Carbon Budget

10th percentile

PASS

10th percentile

0.14g CO2 — below the sustainability target of 0.50g

Cleaner than an estimated 90% of websites analyzed. This page meets the Web Sustainability Guidelines target.

Estimated 10th percentile

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

Top 10%

Target

Median website

0.14g

10th percentile

Cleaner than 90% of websites

✓ Below the Web Sustainability Guidelines target

vs Median 76% cleaner ✓

vs Target 71% cleaner ✓

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 620 KB

Theoretical minimum 620 KB

See Deep Analysis sections above for specific optimizations.

Image Optimization

15 images, 39 KB total, 0 KB wasted

INFO

Image Optimization Audit

Total Images

Total Size

39 KB

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