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

81% efficient

REVIEW

81% efficient

Transfer efficiency: 81%

An estimated 74 KB (19%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 74 KB of unused JavaScript. This wasted data produces 0.02g of unnecessary CO2 per page view.

Total waste: 74 KB (19% of page weight)

Unused JS 74 KB

0.02g unnecessary CO2 per visit

Actual transfer 402 KB

Theoretical minimum 328 KB

Potential savings 74 KB (0.02g 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.

A+

CO2 Per Page Load

0.09g CO2 per view

PASS

0.09g CO2 per view

0.09g CO2 per page view

This page transfers 0.4 MB, producing an estimated 0.09g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.00g, network 0.02g, end-user device 0.07g.

Got: 0.09g CO2 Expected: < 0.50g (sustainability target)

At 10,000 monthly views: 11.2 kg CO2/year

With 10,000 page views per month, this page would generate approximately 11.2 kg of CO2 annually — equivalent to charging 1395 smartphones.

Green hosting reduces data center emissions

0.09g

Carbon Footprint per page view

✓ Below sustainability target (0.50g)

Cleaner than 90% of websites

Sustainable Web Design model v4 · Page size: 0.4 MB

Your site

0.09g

Top 10%

0.20g

Target

0.50g

Median website

0.60g

Energy Breakdown

Data center

0.00g

Network

0.02g

End-user device

0.07g

At 10,000 monthly views: Monthly: 0.9 kg · Annual: 11.2 kg · ≈ 1395 smartphone charges

A+

Repeat Visit Weight

98% cached

PASS

98% cached

98% reduction on repeat visits

Returning visitors download only 7 KB (vs 402 KB first visit). 22 of 23 resources are served from browser cache, saving 0.09g CO2 per repeat visit.

Repeat visit: 0.00g CO2 (first visit: 0.09g)

First visit

402 KB

Repeat visit

7 KB

98% reduction on repeat visits

Saving 0.09g CO2 per returning visitor

22 resources served from cache · 1 resources re-downloaded

A+

Carbon Budget

10th percentile

PASS

10th percentile

0.09g 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

0.09g

10th percentile

Cleaner than 90% of websites

✓ Below the Web Sustainability Guidelines target

vs Median 84% cleaner ✓

vs Target 81% 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

9 images, 96 KB total, 87 KB wasted

INFO

Image Optimization Audit

Total Images

Total Size

96 KB

Oversized

Wasted

87 KB

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