https://thelullabyclub.com.au
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
69
GRADE
D
FIX
2
REVIEW
1
PASS
4
INFO
1
Checks
84 PASS 1 REVIEW 2 FIX
FCO2 Per Page LoadAction5.24g CO2 per viewFIX
CO2 Per Page Load
Action5.24g CO2 per view
5.24g CO2 per view
Critical::
5.24g CO2 per page view
This page transfers 22.1 MB, producing an estimated 5.24g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.13g, network 1.08g, end-user device 4.03g.
Got: 5.24g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 628.9 kg CO2/year
With 10,000 page views per month, this page would generate approximately 628.9 kg of CO2 annually — equivalent to charging 78615 smartphones.
Info::
Green hosting reduces data center emissions
5.24g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 5% of websites
Sustainable Web Design model v4 · Page size: 22.1 MB
Your site
5.24g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.13g
Network
1.08g
End-user device
4.03g
At 10,000 monthly views: Monthly: 52.4 kg · Annual: 628.9 kg · ≈ 78615 smartphone charges
FCarbon BudgetAction95th percentileFIX
Carbon Budget
Action95th percentile
95th percentile
Warning::
5.24g CO2 — above the median website (0.60g)
Heavier than an estimated 5% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 95th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
5.24g
95th percentile
Cleaner than 5% of websites
✗ Above the median website
vs Median 774% more
vs Target 948% more
BWeb Font Weight Variants5 font weights loaded across 2 famil(y/ies)REVIEW
Web Font Weight Variants
5 font weights loaded across 2 famil(y/ies)
5 font weights loaded across 2 famil(y/ies)
Info::
5 font weights loaded -- review whether all are used
5+ weights for a single page is often more than needed. Compare against the actual font-weight CSS rules in your stylesheets; trim weights that aren't applied to any element. Affected families: Inter, Jost.
A+Green HostingGreen (both)PASS
Green Hosting
Green (both)
Green (both)
Info::
Both hosting and CDN use renewable energy
Got: Hosting: Amazon Web Services, CDN: Cloudflare
Info::
Amazon Web Services: Verified by the Green Web Foundation
Info::
Cloudflare: 100% renewable energy for global network since 2019
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 Amazon Web Services✓CDN Cloudflare✓
Amazon Web Services: Verified by the Green Web Foundation
Cloudflare: 100% renewable energy for global network since 2019
Based on known provider commitments. Verify at thegreenwebfoundation.org
A+Repeat Visit Weight99% cachedPASS
Repeat Visit Weight
99% cached
99% cached
Info::
99% reduction on repeat visits
Returning visitors download only 128 KB (vs 22674 KB first visit). 526 of 530 resources are served from browser cache, saving 5.21g CO2 per repeat visit.
Info::
Repeat visit: 0.03g CO2 (first visit: 5.24g)
First visit
22674 KB
Repeat visit
128 KB
99% reduction on repeat visits
Saving 5.21g CO2 per returning visitor
526 resources served from cache · 4 resources re-downloaded
A+Transfer Efficiency97% efficientPASS
Transfer Efficiency
97% efficient
97% efficient
Info::
Transfer efficiency: 97%
Only 660 KB of potential savings identified. Your page is well-optimized for size.
Total waste: 660 KB (3% of page weight)
Unused JS 660 KB
0.15g unnecessary CO2 per visit
Actual transfer 22674 KB
Theoretical minimum 22014 KB
Potential savings 660 KB (0.15g CO2)
See Deep Analysis sections above for specific optimizations.
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
Whether the site is served from green-energy infrastructure
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
Image Optimization200 images, 2545 KB total, 43 KB wastedINFO
Image Optimization
200 images, 2545 KB total, 43 KB wasted
Image Optimization Audit
Total Images
200
Total Size
2545 KB
Oversized
2
Wasted
43 KB
3 missing dimensions 1 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.