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

2 PASS 4 REVIEW 1 FIX

Transfer Efficiency

Action

59% efficient

FIX

59% efficient

Transfer efficiency: 59%

An estimated 1006 KB (41%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 1006 KB of unused JavaScript. This wasted data produces 0.23g of unnecessary CO2 per page view.

Total waste: 1006 KB (41% of page weight)

Unused JS 1006 KB

0.23g unnecessary CO2 per visit

Actual transfer 2458 KB

Theoretical minimum 1451 KB

Potential savings 1006 KB (0.23g CO2)

See Deep Analysis sections above for specific optimizations.

CO2 Per Page Load

0.57g CO2 per view

REVIEW

0.57g CO2 per view

0.57g CO2 per page view

This page transfers 2.4 MB, producing an estimated 0.57g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.01g, network 0.12g, end-user device 0.44g.

Got: 0.57g CO2 Expected: < 0.50g (sustainability target)

At 10,000 monthly views: 68.2 kg CO2/year

With 10,000 page views per month, this page would generate approximately 68.2 kg of CO2 annually — equivalent to charging 8522 smartphones.

Green hosting reduces data center emissions

0.57g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 54% of websites

Sustainable Web Design model v4 · Page size: 2.4 MB

Your site

0.57g

Top 10%

0.20g

Target

0.50g

Median website

0.60g

Energy Breakdown

Data center

0.01g

Network

0.12g

End-user device

0.44g

At 10,000 monthly views: Monthly: 5.7 kg · Annual: 68.2 kg · ≈ 8522 smartphone charges

Green Hosting

Green (hosting)

REVIEW

Green (hosting)

Aruba.it uses renewable energy

Aruba.it: Listed in the Green Web Foundation dataset

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 Aruba.it✓CDN Not identified✗

Aruba.it: Listed in the Green Web Foundation dataset

Based on known provider commitments. Verify at thegreenwebfoundation.org

Carbon Budget

46th percentile

REVIEW

46th percentile

0.57g CO2 — below the median website (0.60g)

Better than an estimated 54% of websites, but above the sustainability target of 0.50g. Reducing page weight would help reach the target.

Estimated 46th percentile

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

Top 10%

Target

Median website

0.57g

46th percentile

Cleaner than 54% of websites

✗ Above the median website

vs Median 5% cleaner ✓

vs Target 14% more

Green Hosting

Action

Whether the site is served from green-energy infrastructure

REVIEW

Green Hosting

No green hosting detected

A+

Repeat Visit Weight

98% cached

PASS

98% cached

98% reduction on repeat visits

Returning visitors download only 52 KB (vs 2458 KB first visit). 82 of 91 resources are served from browser cache, saving 0.56g CO2 per repeat visit.

Repeat visit: 0.01g CO2 (first visit: 0.57g)

First visit

2458 KB

Repeat visit

52 KB

98% reduction on repeat visits

Saving 0.56g CO2 per returning visitor

82 resources served from cache · 9 resources re-downloaded

A+

Web Font Weight Variants

1 font weights loaded across 1 famil(y/ies) -- reasonable

PASS

1 font weights loaded across 1 famil(y/ies) -- reasonable

1 font weight(s) loaded across 1 famil(y/ies)

Image Optimization

30 images, 57 KB total, 0 KB wasted

INFO

Image Optimization Audit

Total Images

Total Size

57 KB

28 missing dimensions 27 missing lazy loading

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