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

84% efficient

REVIEW

84% efficient

Transfer efficiency: 84%

An estimated 122 KB (16%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 122 KB of unused JavaScript. This wasted data produces 0.03g of unnecessary CO2 per page view.

Total waste: 122 KB (16% of page weight)

Unused JS 122 KB

0.03g unnecessary CO2 per visit

Actual transfer 745 KB

Theoretical minimum 623 KB

Potential savings 122 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

0.17g CO2 per view

PASS

0.17g CO2 per view

0.17g CO2 per page view

This page transfers 0.7 MB, producing an estimated 0.17g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.00g, network 0.04g, end-user device 0.13g.

Got: 0.17g CO2 Expected: < 0.50g (sustainability target)

At 10,000 monthly views: 20.7 kg CO2/year

With 10,000 page views per month, this page would generate approximately 20.7 kg of CO2 annually — equivalent to charging 2584 smartphones.

Green hosting reduces data center emissions

0.17g

Carbon Footprint per page view

✓ Below sustainability target (0.50g)

Cleaner than 90% of websites

Sustainable Web Design model v4 · Page size: 0.7 MB

Your site

0.17g

Top 10%

0.20g

Target

0.50g

Median website

0.60g

Energy Breakdown

Data center

0.00g

Network

0.04g

End-user device

0.13g

At 10,000 monthly views: Monthly: 1.7 kg · Annual: 20.7 kg · ≈ 2584 smartphone charges

A+

Repeat Visit Weight

100% cached

PASS

100% cached

100% reduction on repeat visits

Returning visitors download only 3 KB (vs 745 KB first visit). 22 of 24 resources are served from browser cache, saving 0.17g CO2 per repeat visit.

Repeat visit: 0.00g CO2 (first visit: 0.17g)

First visit

745 KB

Repeat visit

3 KB

100% reduction on repeat visits

Saving 0.17g CO2 per returning visitor

22 resources served from cache · 2 resources re-downloaded

A+

Carbon Budget

10th percentile

PASS

10th percentile

0.17g 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

0.17g

10th percentile

Cleaner than 90% of websites

✓ Below the Web Sustainability Guidelines target

vs Median 71% cleaner ✓

vs Target 66% 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.