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

4 PASS 3 REVIEW

Green Hosting

Green (hosting)

REVIEW

Green (hosting)

OVHcloud uses renewable energy

OVHcloud: 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 OVHcloud✓CDN Not identified✗

OVHcloud: Verified by the Green Web Foundation

Based on known provider commitments. Verify at thegreenwebfoundation.org

Transfer Efficiency

89% efficient

REVIEW

89% efficient

Transfer efficiency: 89%

An estimated 135 KB (11%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 135 KB of unused JavaScript. This wasted data produces 0.03g of unnecessary CO2 per page view.

Total waste: 135 KB (11% of page weight)

Unused JS 135 KB

0.03g unnecessary CO2 per visit

Actual transfer 1215 KB

Theoretical minimum 1080 KB

Potential savings 135 KB (0.03g CO2)

See Deep Analysis sections above for specific optimizations.

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

0.28g CO2 per view

PASS

0.28g CO2 per view

0.28g CO2 per page view

This page transfers 1.2 MB, producing an estimated 0.28g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.01g, network 0.06g, end-user device 0.22g.

Got: 0.28g CO2 Expected: < 0.50g (sustainability target)

At 10,000 monthly views: 33.7 kg CO2/year

With 10,000 page views per month, this page would generate approximately 33.7 kg of CO2 annually — equivalent to charging 4215 smartphones.

Green hosting reduces data center emissions

0.28g

Carbon Footprint per page view

✓ Below sustainability target (0.50g)

Cleaner than 82% of websites

Sustainable Web Design model v4 · Page size: 1.2 MB

Your site

0.28g

Top 10%

0.20g

Target

0.50g

Median website

0.60g

Energy Breakdown

Data center

0.01g

Network

0.06g

End-user device

0.22g

At 10,000 monthly views: Monthly: 2.8 kg · Annual: 33.7 kg · ≈ 4215 smartphone charges

A+

Repeat Visit Weight

98% cached

PASS

98% cached

98% reduction on repeat visits

Returning visitors download only 21 KB (vs 1215 KB first visit). 62 of 63 resources are served from browser cache, saving 0.28g CO2 per repeat visit.

Repeat visit: 0.01g CO2 (first visit: 0.28g)

First visit

1215 KB

Repeat visit

21 KB

98% reduction on repeat visits

Saving 0.28g CO2 per returning visitor

62 resources served from cache · 1 resources re-downloaded

Carbon Budget

18th percentile

PASS

18th percentile

0.28g CO2 — below the sustainability target of 0.50g

Cleaner than an estimated 82% of websites analyzed. This page meets the Web Sustainability Guidelines target.

Estimated 18th percentile

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

Top 10%

Target

Median website

0.28g

18th percentile

Cleaner than 82% of websites

✓ Below the Web Sustainability Guidelines target

vs Median 53% cleaner ✓

vs Target 44% cleaner ✓

A+

Green Hosting

Whether the site is served from green-energy infrastructure

PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: OVHcloud

Image Optimization

55 images, 198 KB total, 32 KB wasted

INFO

Image Optimization Audit

Total Images

Total Size

198 KB

Oversized

Wasted

32 KB

6 missing dimensions 44 missing lazy loading

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