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

Green Hosting

Green (hosting)

REVIEW

Green (hosting)

Apache HTTP Server uses renewable energy

Apache HTTP Server: Verified by the Green Web Foundation

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 Apache HTTP Server✓CDN Not identified✗

Apache HTTP Server: Verified by the Green Web Foundation

Based on known provider commitments. Verify at thegreenwebfoundation.org

Web Font Weight Variants

No detectable Google Fonts weights

REVIEW

No detectable Google Fonts weights

The analyzer detects font weights via Google Fonts URL parameters (~70% of font-using sites). Self-hosted fonts and non-Google CDN fonts aren't visible to URL-based detection. If you self-host fonts, manually audit how many @font-face weights you ship -- 2-3 weights per family is typically enough; 5+ is usually unused payload.

CO2 Per Page Load

0.24g CO2 per view

PASS

0.24g CO2 per view

0.24g CO2 per page view

This page transfers 1.0 MB, producing an estimated 0.24g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.01g, network 0.05g, end-user device 0.18g.

Got: 0.24g CO2 Expected: < 0.50g (sustainability target)

At 10,000 monthly views: 28.9 kg CO2/year

With 10,000 page views per month, this page would generate approximately 28.9 kg of CO2 annually — equivalent to charging 3610 smartphones.

Green hosting reduces data center emissions

0.24g

Carbon Footprint per page view

✓ Below sustainability target (0.50g)

Cleaner than 86% of websites

Sustainable Web Design model v4 · Page size: 1.0 MB

Your site

0.24g

Top 10%

0.20g

Target

0.50g

Median website

0.60g

Energy Breakdown

Data center

0.01g

Network

0.05g

End-user device

0.18g

At 10,000 monthly views: Monthly: 2.4 kg · Annual: 28.9 kg · ≈ 3610 smartphone charges

A+

Repeat Visit Weight

98% cached

PASS

98% cached

98% reduction on repeat visits

Returning visitors download only 21 KB (vs 1041 KB first visit). 38 of 40 resources are served from browser cache, saving 0.24g CO2 per repeat visit.

Repeat visit: 0.01g CO2 (first visit: 0.24g)

First visit

1041 KB

Repeat visit

21 KB

98% reduction on repeat visits

Saving 0.24g CO2 per returning visitor

38 resources served from cache · 2 resources re-downloaded

Carbon Budget

14th percentile

PASS

14th percentile

0.24g CO2 — below the sustainability target of 0.50g

Cleaner than an estimated 86% of websites analyzed. This page meets the Web Sustainability Guidelines target.

Estimated 14th percentile

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

Top 10%

Target

Median website

0.24g

14th percentile

Cleaner than 86% of websites

✓ Below the Web Sustainability Guidelines target

vs Median 60% cleaner ✓

vs Target 52% 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 1041 KB

Theoretical minimum 1041 KB

See Deep Analysis sections above for specific optimizations.

A+

Green Hosting

Whether the site is served from green-energy infrastructure

PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Dinahosting, SL

Image Optimization

6 images, 465 KB total, 0 KB wasted

INFO

Image Optimization Audit

Total Images

Total Size

465 KB

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