https://cleobella.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
2
PASS
3
INFO
1
Checks
83 PASS 2 REVIEW 2 FIX
FCO2 Per Page LoadAction1.88g CO2 per viewFIX
CO2 Per Page Load
Action1.88g CO2 per view
1.88g CO2 per view
Warning::
1.88g CO2 per page view
This page transfers 8.0 MB, producing an estimated 1.88g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.05g, network 0.39g, end-user device 1.45g.
Got: 1.88g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 225.9 kg CO2/year
With 10,000 page views per month, this page would generate approximately 225.9 kg of CO2 annually — equivalent to charging 28238 smartphones.
Info::
Green hosting reduces data center emissions
1.88g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 14% of websites
Sustainable Web Design model v4 · Page size: 8.0 MB
Your site
1.88g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.05g
Network
0.39g
End-user device
1.45g
At 10,000 monthly views: Monthly: 18.8 kg · Annual: 225.9 kg · ≈ 28238 smartphone charges
FCarbon BudgetAction86th percentileFIX
Carbon Budget
Action86th percentile
86th percentile
Warning::
1.88g CO2 — above the median website (0.60g)
Heavier than an estimated 14% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 86th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
1.88g
86th percentile
Cleaner than 14% of websites
✗ Above the median website
vs Median 214% more
vs Target 277% more
BTransfer Efficiency85% efficientREVIEW
Transfer Efficiency
85% efficient
85% efficient
Info::
Transfer efficiency: 85%
An estimated 1221 KB (15%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 1221 KB of unused JavaScript. This wasted data produces 0.28g of unnecessary CO2 per page view.
Total waste: 1221 KB (15% of page weight)
Unused JS 1221 KB
0.28g unnecessary CO2 per visit
Actual transfer 8144 KB
Theoretical minimum 6923 KB
Potential savings 1221 KB (0.28g CO2)
See Deep Analysis sections above for specific optimizations.
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.
A+Green HostingGreen (both)PASS
Green Hosting
Green (both)
Green (both)
Info::
Both hosting and CDN use renewable energy
Got: Hosting: GoDaddy, CDN: Cloudflare
Info::
GoDaddy: 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 GoDaddy✓CDN Cloudflare✓
GoDaddy: 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 Weight97% cachedPASS
Repeat Visit Weight
97% cached
97% cached
Info::
97% reduction on repeat visits
Returning visitors download only 240 KB (vs 8144 KB first visit). 733 of 744 resources are served from browser cache, saving 1.83g CO2 per repeat visit.
Info::
Repeat visit: 0.06g CO2 (first visit: 1.88g)
First visit
8144 KB
Repeat visit
240 KB
97% reduction on repeat visits
Saving 1.83g CO2 per returning visitor
733 resources served from cache · 11 resources re-downloaded
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 Optimization106 images, 2095 KB total, 335 KB wastedINFO
Image Optimization
106 images, 2095 KB total, 335 KB wasted
Image Optimization Audit
Total Images
106
Total Size
2095 KB
Oversized
8
Wasted
335 KB
2 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.