https://www.waadhoeke.nl
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
3
REVIEW
2
PASS
2
INFO
1
Checks
82 PASS 2 REVIEW 3 FIX
DCO2 Per Page LoadAction1.34g CO2 per viewFIX
CO2 Per Page Load
Action1.34g CO2 per view
1.34g CO2 per view
Warning::
1.34g CO2 per page view
This page transfers 4.7 MB, producing an estimated 1.34g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.25g, network 0.23g, end-user device 0.86g.
Got: 1.34g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 160.5 kg CO2/year
With 10,000 page views per month, this page would generate approximately 160.5 kg of CO2 annually — equivalent to charging 20061 smartphones.
1.34g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 29% of websites
Sustainable Web Design model v4 · Page size: 4.7 MB
Your site
1.34g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.25g
Network
0.23g
End-user device
0.86g
At 10,000 monthly views: Monthly: 13.4 kg · Annual: 160.5 kg · ≈ 20061 smartphone charges
DGreen HostingActionNot greenFIX
Green Hosting
ActionNot green
Not green
Info::
No confirmed renewable energy commitment detected
Consider providers like Cloudflare, Google Cloud, or Vercel that match 100% of their energy use with renewables.
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 HostingNot Green Hosted
Hosting Apache HTTP Server✗CDN Not identified✗
Based on known provider commitments. Verify at thegreenwebfoundation.org
FCarbon BudgetAction71th percentileFIX
Carbon Budget
Action71th percentile
71th percentile
Warning::
1.34g CO2 — above the median website (0.60g)
Heavier than an estimated 29% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 71th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
1.34g
71st percentile
Cleaner than 29% of websites
✗ Above the median website
vs Median 123% more
vs Target 167% more
BWeb Font Weight VariantsNo detectable Google Fonts weightsREVIEW
Web Font Weight Variants
No detectable Google Fonts weights
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.
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
ActionWhether the site is served from green-energy infrastructure
Green Hosting
No green hosting detected
A+Repeat Visit Weight100% cachedPASS
Repeat Visit Weight
100% cached
100% cached
Info::
100% reduction on repeat visits
Returning visitors download only 11 KB (vs 4835 KB first visit). 49 of 50 resources are served from browser cache, saving 1.33g CO2 per repeat visit.
Info::
Repeat visit: 0.00g CO2 (first visit: 1.34g)
First visit
4835 KB
Repeat visit
11 KB
100% reduction on repeat visits
Saving 1.33g CO2 per returning visitor
49 resources served from cache · 1 resources re-downloaded
A+Transfer Efficiency92% efficientPASS
Transfer Efficiency
92% efficient
92% efficient
Info::
Transfer efficiency: 92%
Only 392 KB of potential savings identified. Your page is well-optimized for size.
Total waste: 392 KB (8% of page weight)
Unused JS 392 KB
0.11g unnecessary CO2 per visit
Actual transfer 4835 KB
Theoretical minimum 4443 KB
Potential savings 392 KB (0.11g CO2)
See Deep Analysis sections above for specific optimizations.
Image Optimization18 images, 1218 KB total, 328 KB wastedINFO
Image Optimization
18 images, 1218 KB total, 328 KB wasted
Image Optimization Audit
Total Images
18
Total Size
1218 KB
Oversized
3
Wasted
328 KB
2 missing dimensions 15 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.