https://www.woensdrecht.nl
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
71
GRADE
C
FIX
3
REVIEW
2
PASS
2
INFO
1
Checks
82 PASS 2 REVIEW 3 FIX
DCO2 Per Page LoadAction0.89g CO2 per viewFIX
CO2 Per Page Load
Action0.89g CO2 per view
0.89g CO2 per view
Info::
0.89g CO2 per page view
This page transfers 3.1 MB, producing an estimated 0.89g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.16g, network 0.15g, end-user device 0.57g.
Got: 0.89g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 106.9 kg CO2/year
With 10,000 page views per month, this page would generate approximately 106.9 kg of CO2 annually — equivalent to charging 13360 smartphones.
0.89g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 42% of websites
Sustainable Web Design model v4 · Page size: 3.1 MB
Your site
0.89g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.16g
Network
0.15g
End-user device
0.57g
At 10,000 monthly views: Monthly: 8.9 kg · Annual: 106.9 kg · ≈ 13360 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 Next.js✗CDN Not identified✗
Based on known provider commitments. Verify at thegreenwebfoundation.org
DCarbon BudgetAction58th percentileFIX
Carbon Budget
Action58th percentile
58th percentile
Warning::
0.89g CO2 — above the median website (0.60g)
Heavier than an estimated 42% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 58th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
0.89g
58th percentile
Cleaner than 42% of websites
✗ Above the median website
vs Median 48% more
vs Target 78% 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 Weight98% cachedPASS
Repeat Visit Weight
98% cached
98% cached
Info::
98% reduction on repeat visits
Returning visitors download only 48 KB (vs 3220 KB first visit). 99 of 101 resources are served from browser cache, saving 0.88g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 0.89g)
First visit
3220 KB
Repeat visit
48 KB
98% reduction on repeat visits
Saving 0.88g CO2 per returning visitor
99 resources served from cache · 2 resources re-downloaded
A+Transfer Efficiency95% efficientPASS
Transfer Efficiency
95% efficient
95% efficient
Info::
Transfer efficiency: 95%
Only 168 KB of potential savings identified. Your page is well-optimized for size.
Total waste: 168 KB (5% of page weight)
Unused JS 168 KB
0.05g unnecessary CO2 per visit
Actual transfer 3220 KB
Theoretical minimum 3052 KB
Potential savings 168 KB (0.05g CO2)
See Deep Analysis sections above for specific optimizations.
Image Optimization14 images, 0 KB total, 0 KB wastedINFO
Image Optimization
14 images, 0 KB total, 0 KB wasted
Image Optimization Audit
Total Images
14
Total Size
0 KB
Oversized
7
4 missing dimensions 4 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.