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)

BIT uses renewable energy

BIT: 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 BIT✓CDN Not identified✗

BIT: Verified by the Green Web Foundation

Based on known provider commitments. Verify at thegreenwebfoundation.org

Carbon Budget

32th percentile

REVIEW

32th percentile

0.42g CO2 — below the sustainability target of 0.50g

Cleaner than an estimated 68% of websites analyzed. This page meets the Web Sustainability Guidelines target.

Estimated 32th percentile

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

Top 10%

Target

Median website

0.42g

32nd percentile

Cleaner than 68% of websites

✓ Below the Web Sustainability Guidelines target

vs Median 30% cleaner ✓

vs Target 16% cleaner ✓

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.

CO2 Per Page Load

0.42g CO2 per view

PASS

0.42g CO2 per view

0.42g CO2 per page view

This page transfers 1.8 MB, producing an estimated 0.42g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.01g, network 0.09g, end-user device 0.32g.

Got: 0.42g CO2 Expected: < 0.50g (sustainability target)

At 10,000 monthly views: 50.4 kg CO2/year

With 10,000 page views per month, this page would generate approximately 50.4 kg of CO2 annually — equivalent to charging 6304 smartphones.

Green hosting reduces data center emissions

0.42g

Carbon Footprint per page view

✓ Below sustainability target (0.50g)

Cleaner than 68% of websites

Sustainable Web Design model v4 · Page size: 1.8 MB

Your site

0.42g

Top 10%

0.20g

Target

0.50g

Median website

0.60g

Energy Breakdown

Data center

0.01g

Network

0.09g

End-user device

0.32g

At 10,000 monthly views: Monthly: 4.2 kg · Annual: 50.4 kg · ≈ 6304 smartphone charges

A+

Repeat Visit Weight

99% cached

PASS

99% cached

99% reduction on repeat visits

Returning visitors download only 24 KB (vs 1818 KB first visit). 396 of 397 resources are served from browser cache, saving 0.41g CO2 per repeat visit.

Repeat visit: 0.01g CO2 (first visit: 0.42g)

First visit

1818 KB

Repeat visit

24 KB

99% reduction on repeat visits

Saving 0.41g CO2 per returning visitor

396 resources served from cache · 1 resources re-downloaded

A+

Transfer Efficiency

92% efficient

PASS

92% efficient

Transfer efficiency: 92%

Only 139 KB of potential savings identified. Your page is well-optimized for size.

Total waste: 139 KB (8% of page weight)

Unused JS 139 KB

0.03g unnecessary CO2 per visit

Actual transfer 1818 KB

Theoretical minimum 1678 KB

Potential savings 139 KB (0.03g CO2)

See Deep Analysis sections above for specific optimizations.

A+

Green Hosting

Whether the site is served from green-energy infrastructure

PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: BIT

Image Optimization

8 images, 116 KB total, 0 KB wasted

INFO

Image Optimization Audit

Total Images

Total Size

116 KB

6 missing lazy loading

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