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https://kitco.com

Sustainability

· 6 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.
SCORE
68
GRADE
D
FIX
3
REVIEW
1
PASS
2
INFO
0
Device:
Mobile Desktop
Checks
6
2 PASS 1 REVIEW 3 FIX
D
CO2 Per Page Load
Action
1.07g CO2 per view
FIX
1.07g CO2 per view
Warning::
1.07g CO2 per page view
This page transfers 4.5 MB, producing an estimated 1.07g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.03g, network 0.22g, end-user device 0.82g.
Got: 1.07g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 128.0 kg CO2/year
With 10,000 page views per month, this page would generate approximately 128.0 kg of CO2 annually — equivalent to charging 16003 smartphones.
Info::
Green hosting reduces data center emissions

1.07g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 37% of websites

Sustainable Web Design model v4 · Page size: 4.5 MB

Your site
1.07g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.03g
Network
0.22g
End-user device
0.82g
At 10,000 monthly views: Monthly: 10.7 kg · Annual: 128.0 kg · ≈ 16003 smartphone charges
D
Carbon Budget
Action
63th percentile
FIX
63th percentile
Warning::
1.07g CO2 — above the median website (0.60g)
Heavier than an estimated 37% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 63th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website

1.07g

63rd percentile

Cleaner than 37% of websites

✗ Above the median website

vs Median 78% more
vs Target 113% more
F
Transfer Efficiency
Action
2% efficient
FIX
2% efficient
Critical::
Transfer efficiency: 2%
An estimated 4519 KB (98%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 4519 KB of unused JavaScript. This wasted data produces 1.04g of unnecessary CO2 per page view.
2% efficient

Total waste: 4519 KB (98% of page weight)

Unused JS 4519 KB

1.04g unnecessary CO2 per visit

Actual transfer 4615 KB
Theoretical minimum 95 KB
Potential savings 4519 KB (1.04g CO2)

See Deep Analysis sections above for specific optimizations.

B
Green Hosting
Green (hosting)
REVIEW
Green (hosting)
Info::
Google Cloud uses renewable energy
Info::
Google Cloud: Verified by the Green Web Foundation
Info::
Google Cloud CDN: Inherits Google Cloud regional renewable mix
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 Google Cloud✓CDN Google Cloud CDN✗

Google Cloud: Verified by the Green Web Foundation

Google Cloud CDN: Inherits Google Cloud regional renewable mix

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 55 KB (vs 4615 KB first visit). 403 of 406 resources are served from browser cache, saving 1.05g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 1.07g)
First visit
4615 KB
Repeat visit
55 KB

99% reduction on repeat visits

Saving 1.05g CO2 per returning visitor

403 resources served from cache · 3 resources re-downloaded

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

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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