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

5 PASS 2 REVIEW

Web Font Weight Variants

6 font weights loaded across 1 famil(y/ies)

REVIEW

6 font weights loaded across 1 famil(y/ies)

6 font weights loaded -- review whether all are used

5+ weights for a single page is often more than needed. Compare against the actual font-weight CSS rules in your stylesheets; trim weights that aren't applied to any element. Affected families: Inter.

Green Hosting

Action

Whether the site is served from green-energy infrastructure

REVIEW

Green Hosting

No green hosting detected

A+

CO2 Per Page Load

0.11g CO2 per view

PASS

0.11g CO2 per view

0.11g CO2 per page view

This page transfers 0.5 MB, producing an estimated 0.11g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.00g, network 0.02g, end-user device 0.08g.

Got: 0.11g CO2 Expected: < 0.50g (sustainability target)

At 10,000 monthly views: 13.1 kg CO2/year

With 10,000 page views per month, this page would generate approximately 13.1 kg of CO2 annually — equivalent to charging 1638 smartphones.

Green hosting reduces data center emissions

0.11g

Carbon Footprint per page view

✓ Below sustainability target (0.50g)

Cleaner than 90% of websites

Sustainable Web Design model v4 · Page size: 0.5 MB

Your site

0.11g

Top 10%

0.20g

Target

0.50g

Median website

0.60g

Energy Breakdown

Data center

0.00g

Network

0.02g

End-user device

0.08g

At 10,000 monthly views: Monthly: 1.1 kg · Annual: 13.1 kg · ≈ 1638 smartphone charges

Green Hosting

Green (cdn)

PASS

Green (cdn)

Cloudflare CDN uses renewable energy

Since most traffic is served through the CDN, the majority of data transfer energy is renewable.

Cloudflare: 100% renewable energy for global network since 2019

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 Not identified✗CDN Cloudflare✓

Cloudflare: 100% renewable energy for global network since 2019

Based on known provider commitments. Verify at thegreenwebfoundation.org

A+

Repeat Visit Weight

81% cached

PASS

81% cached

81% reduction on repeat visits

Returning visitors download only 91 KB (vs 472 KB first visit). 60 of 61 resources are served from browser cache, saving 0.09g CO2 per repeat visit.

Repeat visit: 0.02g CO2 (first visit: 0.11g)

First visit

472 KB

Repeat visit

91 KB

81% reduction on repeat visits

Saving 0.09g CO2 per returning visitor

60 resources served from cache · 1 resources re-downloaded

A+

Carbon Budget

10th percentile

PASS

10th percentile

0.11g 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

0.11g

10th percentile

Cleaner than 90% of websites

✓ Below the Web Sustainability Guidelines target

vs Median 82% cleaner ✓

vs Target 78% cleaner ✓

A+

Transfer Efficiency

100% efficient

PASS

100% efficient

Transfer efficiency: 100%

Only 0 KB of potential savings identified. Your page is well-optimized for size.

Actual transfer 472 KB

Theoretical minimum 472 KB

See Deep Analysis sections above for specific optimizations.

Image Optimization

200 images, 0 KB total, 0 KB wasted

INFO

Image Optimization Audit

Total Images

200

Total Size

0 KB

Oversized

200 missing dimensions

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