Sustainability

· 7 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)

Express uses renewable energy

Express: 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 Express✓CDN Not identified✗

Express: Verified by the Green Web Foundation

Based on known provider commitments. Verify at thegreenwebfoundation.org

Transfer Efficiency

80% efficient

REVIEW

80% efficient

Transfer efficiency: 80%

An estimated 123 KB (20%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 123 KB of unused JavaScript. This wasted data produces 0.03g of unnecessary CO2 per page view.

Total waste: 123 KB (20% of page weight)

Unused JS 123 KB

0.03g unnecessary CO2 per visit

Actual transfer 610 KB

Theoretical minimum 487 KB

Potential savings 123 KB (0.03g CO2)

See Deep Analysis sections above for specific optimizations.

Web Font Weight Variants

Action

28 font weights loaded across 9 famil(y/ies)

REVIEW

28 font weights loaded across 9 famil(y/ies)

28 font weights loaded -- likely 100+ KB of unused payload

Loading 28 font weights typically transfers 200-400 KB just for fonts. Most pages legitimately use 2-3 weights (regular + bold, maybe medium). Audit which weights your stylesheet actually applies and trim the Google Fonts URL accordingly. Affected families: Amiri, Cinzel, Gulzar, Hind Siliguri, Noto Nastaliq Urdu, Noto Serif Bengali, Noto Serif Devanagari, Playfair Display, Plus Jakarta Sans.

A+

CO2 Per Page Load

0.14g CO2 per view

PASS

0.14g CO2 per view

0.14g CO2 per page view

This page transfers 0.6 MB, producing an estimated 0.14g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.00g, network 0.03g, end-user device 0.11g.

Got: 0.14g CO2 Expected: < 0.50g (sustainability target)

At 10,000 monthly views: 16.9 kg CO2/year

With 10,000 page views per month, this page would generate approximately 16.9 kg of CO2 annually — equivalent to charging 2118 smartphones.

Green hosting reduces data center emissions

0.14g

Carbon Footprint per page view

✓ Below sustainability target (0.50g)

Cleaner than 90% of websites

Sustainable Web Design model v4 · Page size: 0.6 MB

Your site

0.14g

Top 10%

0.20g

Target

0.50g

Median website

0.60g

Energy Breakdown

Data center

0.00g

Network

0.03g

End-user device

0.11g

At 10,000 monthly views: Monthly: 1.4 kg · Annual: 16.9 kg · ≈ 2118 smartphone charges

A+

Repeat Visit Weight

100% cached

PASS

100% cached

100% reduction on repeat visits

Returning visitors download only 2 KB (vs 610 KB first visit). 17 of 18 resources are served from browser cache, saving 0.14g CO2 per repeat visit.

Repeat visit: 0.00g CO2 (first visit: 0.14g)

First visit

610 KB

Repeat visit

2 KB

100% reduction on repeat visits

Saving 0.14g CO2 per returning visitor

17 resources served from cache · 1 resources re-downloaded

A+

Carbon Budget

10th percentile

PASS

10th percentile

0.14g 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

0.14g

10th percentile

Cleaner than 90% of websites

✓ Below the Web Sustainability Guidelines target

vs Median 76% cleaner ✓

vs Target 72% 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: Google Cloud

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