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)

Hostinger uses renewable energy

Hostinger: 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 Hostinger✓CDN Not identified✗

Hostinger: Verified by the Green Web Foundation

Based on known provider commitments. Verify at thegreenwebfoundation.org

Transfer Efficiency

Action

74% efficient

REVIEW

74% efficient

Transfer efficiency: 74%

An estimated 310 KB (26%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 310 KB of unused JavaScript. This wasted data produces 0.07g of unnecessary CO2 per page view.

Total waste: 310 KB (26% of page weight)

Unused JS 310 KB

0.07g unnecessary CO2 per visit

Actual transfer 1174 KB

Theoretical minimum 864 KB

Potential savings 310 KB (0.07g 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

0.27g CO2 per view

PASS

0.27g CO2 per view

0.27g CO2 per page view

This page transfers 1.1 MB, producing an estimated 0.27g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.01g, network 0.06g, end-user device 0.21g.

Got: 0.27g CO2 Expected: < 0.50g (sustainability target)

At 10,000 monthly views: 32.6 kg CO2/year

With 10,000 page views per month, this page would generate approximately 32.6 kg of CO2 annually — equivalent to charging 4073 smartphones.

Green hosting reduces data center emissions

0.27g

Carbon Footprint per page view

✓ Below sustainability target (0.50g)

Cleaner than 83% of websites

Sustainable Web Design model v4 · Page size: 1.1 MB

Your site

0.27g

Top 10%

0.20g

Target

0.50g

Median website

0.60g

Energy Breakdown

Data center

0.01g

Network

0.06g

End-user device

0.21g

At 10,000 monthly views: Monthly: 2.7 kg · Annual: 32.6 kg · ≈ 4073 smartphone charges

A+

Repeat Visit Weight

97% cached

PASS

97% cached

97% reduction on repeat visits

Returning visitors download only 36 KB (vs 1174 KB first visit). 36 of 37 resources are served from browser cache, saving 0.26g CO2 per repeat visit.

Repeat visit: 0.01g CO2 (first visit: 0.27g)

First visit

1174 KB

Repeat visit

36 KB

97% reduction on repeat visits

Saving 0.26g CO2 per returning visitor

36 resources served from cache · 1 resources re-downloaded

Carbon Budget

17th percentile

PASS

17th percentile

0.27g CO2 — below the sustainability target of 0.50g

Cleaner than an estimated 83% of websites analyzed. This page meets the Web Sustainability Guidelines target.

Estimated 17th percentile

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

Top 10%

Target

Median website

0.27g

17th percentile

Cleaner than 83% of websites

✓ Below the Web Sustainability Guidelines target

vs Median 55% cleaner ✓

vs Target 46% 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: Hostinger

Image Optimization

27 images, 49 KB total, 0 KB wasted

INFO

Image Optimization Audit

Total Images

Total Size

49 KB

3 missing dimensions 1 missing lazy loading

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