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Sustainability

· 6 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.
SCORE
91
GRADE
A
FIX
0
REVIEW
1
PASS
5
INFO
0
Device:
Mobile Desktop
Checks
6
5 PASS 1 REVIEW
B
Carbon Budget
37th percentile
REVIEW
37th percentile
Info::
0.47g CO2 — below the sustainability target of 0.50g
Cleaner than an estimated 63% of websites analyzed. This page meets the Web Sustainability Guidelines target.
Info::
Estimated 37th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website

0.47g

37th percentile

Cleaner than 63% of websites

✓ Below the Web Sustainability Guidelines target

vs Median 21% cleaner ✓
vs Target 5% cleaner ✓
A
CO2 Per Page Load
0.47g CO2 per view
PASS
0.47g CO2 per view
Info::
0.47g CO2 per page view
This page transfers 2.0 MB, producing an estimated 0.47g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.01g, network 0.10g, end-user device 0.36g.
Got: 0.47g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 56.8 kg CO2/year
With 10,000 page views per month, this page would generate approximately 56.8 kg of CO2 annually — equivalent to charging 7096 smartphones.
Info::
Green hosting reduces data center emissions

0.47g

Carbon Footprint per page view

✓ Below sustainability target (0.50g)

Cleaner than 63% of websites

Sustainable Web Design model v4 · Page size: 2.0 MB

Your site
0.47g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.01g
Network
0.10g
End-user device
0.36g
At 10,000 monthly views: Monthly: 4.7 kg · Annual: 56.8 kg · ≈ 7096 smartphone charges
A+
Green Hosting
Green (both)
PASS
Green (both)
Info::
Both hosting and CDN use renewable energy
Got: Hosting: Equinix, Inc., CDN: Netlify
Info::
Equinix, Inc.: Verified by the Green Web Foundation
Info::
Netlify: Hosted on AWS/Google Cloud with renewable energy matching
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 Equinix, Inc.✓CDN Netlify✓

Equinix, Inc.: Verified by the Green Web Foundation

Netlify: Hosted on AWS/Google Cloud with renewable energy matching

Based on known provider commitments. Verify at thegreenwebfoundation.org

A+
Repeat Visit Weight
99% cached
PASS
99% cached
Info::
99% reduction on repeat visits
Returning visitors download only 11 KB (vs 2046 KB first visit). 36 of 37 resources are served from browser cache, saving 0.47g CO2 per repeat visit.
Info::
Repeat visit: 0.00g CO2 (first visit: 0.47g)
First visit
2046 KB
Repeat visit
11 KB

99% reduction on repeat visits

Saving 0.47g CO2 per returning visitor

36 resources served from cache · 1 resources re-downloaded

A+
Transfer Efficiency
93% efficient
PASS
93% efficient
Info::
Transfer efficiency: 93%
Only 133 KB of potential savings identified. Your page is well-optimized for size.
93% efficient

Total waste: 133 KB (7% of page weight)

Unused JS 133 KB

0.03g unnecessary CO2 per visit

Actual transfer 2046 KB
Theoretical minimum 1912 KB
Potential savings 133 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: Equinix, Inc.

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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