Skip to content
https://heidcustomwoodworking.com

Sustainability

· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.
SCORE
75
GRADE
C
FIX
2
REVIEW
3
PASS
2
INFO
1
Device:
Mobile Desktop
Checks
8
2 PASS 3 REVIEW 2 FIX
D
Green Hosting
Action
Unknown
FIX
Unknown
Info::
Hosting provider could not be identified
Without knowing the provider, we cannot determine their energy sourcing. Check with your hosting provider about their renewable energy commitments.
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 HostingUnable to Determine
Hosting Not identified✗CDN Not identified✗

Based on known provider commitments. Verify at thegreenwebfoundation.org

D
Carbon Budget
Action
53th percentile
FIX
53th percentile
Warning::
0.74g CO2 — above the median website (0.60g)
Heavier than an estimated 47% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 53th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website

0.74g

53rd percentile

Cleaner than 47% of websites

✗ Above the median website

vs Median 23% more
vs Target 47% more
B
CO2 Per Page Load
0.74g CO2 per view
REVIEW
0.74g CO2 per view
Info::
0.74g CO2 per page view
This page transfers 2.6 MB, producing an estimated 0.74g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.14g, network 0.13g, end-user device 0.47g.
Got: 0.74g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 88.4 kg CO2/year
With 10,000 page views per month, this page would generate approximately 88.4 kg of CO2 annually — equivalent to charging 11051 smartphones.

0.74g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 47% of websites

Sustainable Web Design model v4 · Page size: 2.6 MB

Your site
0.74g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.14g
Network
0.13g
End-user device
0.47g
At 10,000 monthly views: Monthly: 7.4 kg · Annual: 88.4 kg · ≈ 11051 smartphone charges
B
Transfer Efficiency
81% efficient
REVIEW
81% efficient
Info::
Transfer efficiency: 81%
An estimated 500 KB (19%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 500 KB of unused JavaScript. This wasted data produces 0.14g of unnecessary CO2 per page view.
81% efficient

Total waste: 500 KB (19% of page weight)

Unused JS 500 KB

0.14g unnecessary CO2 per visit

Actual transfer 2664 KB
Theoretical minimum 2163 KB
Potential savings 500 KB (0.14g CO2)

See Deep Analysis sections above for specific optimizations.

C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Repeat Visit Weight
94% cached
PASS
94% cached
Info::
94% reduction on repeat visits
Returning visitors download only 164 KB (vs 2664 KB first visit). 74 of 75 resources are served from browser cache, saving 0.69g CO2 per repeat visit.
Info::
Repeat visit: 0.05g CO2 (first visit: 0.74g)
First visit
2664 KB
Repeat visit
164 KB

94% reduction on repeat visits

Saving 0.69g CO2 per returning visitor

74 resources served from cache · 1 resources re-downloaded

A+
Web Font Weight Variants
2 font weights loaded across 1 famil(y/ies) -- reasonable
PASS
2 font weights loaded across 1 famil(y/ies) -- reasonable
Info::
2 font weight(s) loaded across 1 famil(y/ies)
Image Optimization
119 images, 729 KB total, 267 KB wasted
INFO

Image Optimization Audit

Total Images

119

Total Size

729 KB

Oversized

2

Wasted

267 KB

1 missing alt text 4 missing dimensions 3 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

Send Feedback