https://www.kiyonna.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
Checks
82 PASS 3 REVIEW 2 FIX
DCO2 Per Page LoadAction1.15g CO2 per viewFIX
CO2 Per Page Load
Action1.15g CO2 per view
1.15g CO2 per view
Warning::
1.15g CO2 per page view
This page transfers 4.9 MB, producing an estimated 1.15g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.03g, network 0.24g, end-user device 0.88g.
Got: 1.15g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 138.1 kg CO2/year
With 10,000 page views per month, this page would generate approximately 138.1 kg of CO2 annually — equivalent to charging 17265 smartphones.
Info::
Green hosting reduces data center emissions
1.15g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 35% of websites
Sustainable Web Design model v4 · Page size: 4.9 MB
Your site
1.15g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.03g
Network
0.24g
End-user device
0.88g
At 10,000 monthly views: Monthly: 11.5 kg · Annual: 138.1 kg · ≈ 17265 smartphone charges
DCarbon BudgetAction65th percentileFIX
Carbon Budget
Action65th percentile
65th percentile
Warning::
1.15g CO2 — above the median website (0.60g)
Heavier than an estimated 35% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 65th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
1.15g
65th percentile
Cleaner than 35% of websites
✗ Above the median website
vs Median 92% more
vs Target 130% more
BGreen HostingGreen (hosting)REVIEW
Green Hosting
Green (hosting)
Green (hosting)
Info::
Cloudflare uses renewable energy
Info::
Cloudflare: Verified by the Green Web Foundation
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 Cloudflare✓CDN Shopify✗
Cloudflare: Verified by the Green Web Foundation
Based on known provider commitments. Verify at thegreenwebfoundation.org
BTransfer Efficiency89% efficientREVIEW
Transfer Efficiency
89% efficient
89% efficient
Info::
Transfer efficiency: 89%
An estimated 570 KB (11%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 570 KB of unused JavaScript. This wasted data produces 0.13g of unnecessary CO2 per page view.
Total waste: 570 KB (11% of page weight)
Unused JS 570 KB
0.13g unnecessary CO2 per visit
Actual transfer 4979 KB
Theoretical minimum 4409 KB
Potential savings 570 KB (0.13g 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+Repeat Visit Weight95% cachedPASS
Repeat Visit Weight
95% cached
95% cached
Info::
95% reduction on repeat visits
Returning visitors download only 239 KB (vs 4979 KB first visit). 359 of 367 resources are served from browser cache, saving 1.10g CO2 per repeat visit.
Info::
Repeat visit: 0.06g CO2 (first visit: 1.15g)
First visit
4979 KB
Repeat visit
239 KB
95% reduction on repeat visits
Saving 1.10g CO2 per returning visitor
359 resources served from cache · 8 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 Optimization41 images, 1396 KB total, 0 KB wastedINFO
Image Optimization
41 images, 1396 KB total, 0 KB wasted
Image Optimization Audit
Total Images
41
Total Size
1396 KB
1 missing alt text 11 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.