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Sustainability

· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.
SCORE
68
GRADE
D
FIX
2
REVIEW
2
PASS
3
INFO
1
Device:
Mobile Desktop
Checks
8
3 PASS 2 REVIEW 2 FIX
F
CO2 Per Page Load
Action
3.82g CO2 per view
FIX
3.82g CO2 per view
Critical::
3.82g CO2 per page view
This page transfers 16.1 MB, producing an estimated 3.82g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.10g, network 0.79g, end-user device 2.94g.
Got: 3.82g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 458.5 kg CO2/year
With 10,000 page views per month, this page would generate approximately 458.5 kg of CO2 annually — equivalent to charging 57317 smartphones.
Info::
Green hosting reduces data center emissions

3.82g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 5% of websites

Sustainable Web Design model v4 · Page size: 16.1 MB

Your site
3.82g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.10g
Network
0.79g
End-user device
2.94g
At 10,000 monthly views: Monthly: 38.2 kg · Annual: 458.5 kg · ≈ 57317 smartphone charges
F
Carbon Budget
Action
95th percentile
FIX
95th percentile
Warning::
3.82g CO2 — above the median website (0.60g)
Heavier than an estimated 5% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 95th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website

3.82g

95th percentile

Cleaner than 5% of websites

✗ Above the median website

vs Median 537% more
vs Target 664% more
B
Green Hosting
Green (hosting)
REVIEW
Green (hosting)
Info::
Cloudflare uses renewable energy
Info::
Cloudflare: Verified by the Green Web Foundation
Info::
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 Cloudflare✓CDN Shopify✗

Cloudflare: Verified by the Green Web Foundation

Based on known provider commitments. Verify at thegreenwebfoundation.org

B
Web Font Weight Variants
No detectable Google Fonts weights
REVIEW
No detectable Google Fonts weights
Info::
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.
A+
Repeat Visit Weight
98% cached
PASS
98% cached
Info::
98% reduction on repeat visits
Returning visitors download only 311 KB (vs 16531 KB first visit). 666 of 680 resources are served from browser cache, saving 3.75g CO2 per repeat visit.
Info::
Repeat visit: 0.07g CO2 (first visit: 3.82g)
First visit
16531 KB
Repeat visit
311 KB

98% reduction on repeat visits

Saving 3.75g CO2 per returning visitor

666 resources served from cache · 14 resources re-downloaded

A+
Transfer Efficiency
92% efficient
PASS
92% efficient
Info::
Transfer efficiency: 92%
Only 1272 KB of potential savings identified. Your page is well-optimized for size.
92% efficient

Total waste: 1272 KB (8% of page weight)

Unused JS 1272 KB

0.29g unnecessary CO2 per visit

Actual transfer 16531 KB
Theoretical minimum 15259 KB
Potential savings 1272 KB (0.29g 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: Cloudflare

Image Optimization
1 images, 6 KB total, 0 KB wasted
INFO

Image Optimization Audit

Total Images

1

Total Size

6 KB

1 missing dimensions 1 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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