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https://barrettstudio.com

Sustainability

· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.
SCORE
86
GRADE
B
FIX
0
REVIEW
3
PASS
4
INFO
1
Device:
Mobile Desktop
Checks
8
4 PASS 3 REVIEW
B
CO2 Per Page Load
0.61g CO2 per view
REVIEW
0.61g CO2 per view
Info::
0.61g CO2 per page view
This page transfers 2.6 MB, producing an estimated 0.61g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.02g, network 0.13g, end-user device 0.47g.
Got: 0.61g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 73.0 kg CO2/year
With 10,000 page views per month, this page would generate approximately 73.0 kg of CO2 annually — equivalent to charging 9120 smartphones.
Info::
Green hosting reduces data center emissions

0.61g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 50% of websites

Sustainable Web Design model v4 · Page size: 2.6 MB

Your site
0.61g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.02g
Network
0.13g
End-user device
0.47g
At 10,000 monthly views: Monthly: 6.1 kg · Annual: 73.0 kg · ≈ 9120 smartphone charges
B
Green Hosting
Green (hosting)
REVIEW
Green (hosting)
Info::
GoDaddy uses renewable energy
Info::
GoDaddy: 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 GoDaddy✓CDN Not identified✗

GoDaddy: Verified by the Green Web Foundation

Based on known provider commitments. Verify at thegreenwebfoundation.org

B
Carbon Budget
50th percentile
REVIEW
50th percentile
Warning::
0.61g CO2 — above the median website (0.60g)
Heavier than an estimated 50% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 50th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website

0.61g

50th percentile

Cleaner than 50% of websites

✗ Above the median website

vs Median 1% more
vs Target 22% more
A+
Repeat Visit Weight
99% cached
PASS
99% cached
Info::
99% reduction on repeat visits
Returning visitors download only 15 KB (vs 2630 KB first visit). 101 of 102 resources are served from browser cache, saving 0.60g CO2 per repeat visit.
Info::
Repeat visit: 0.00g CO2 (first visit: 0.61g)
First visit
2630 KB
Repeat visit
15 KB

99% reduction on repeat visits

Saving 0.60g CO2 per returning visitor

101 resources served from cache · 1 resources re-downloaded

A+
Transfer Efficiency
100% efficient
PASS
100% efficient
Info::
Transfer efficiency: 100%
Only 0 KB of potential savings identified. Your page is well-optimized for size.
100% efficient
Actual transfer 2630 KB
Theoretical minimum 2630 KB

See Deep Analysis sections above for specific optimizations.

A+
Web Font Weight Variants
3 font weights loaded across 1 famil(y/ies) -- reasonable
PASS
3 font weights loaded across 1 famil(y/ies) -- reasonable
Info::
3 font weight(s) loaded across 1 famil(y/ies)
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

Image Optimization
18 images, 437 KB total, 317 KB wasted
INFO

Image Optimization Audit

Total Images

18

Total Size

437 KB

Oversized

13

Wasted

317 KB

3 missing alt text 1 missing dimensions 17 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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