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
2
PASS
3
INFO
1
Checks
83 PASS 2 REVIEW 2 FIX
DCO2 Per Page LoadAction1.37g CO2 per viewFIX
CO2 Per Page Load
Action1.37g CO2 per view
1.37g CO2 per view
Warning::
1.37g CO2 per page view
This page transfers 5.8 MB, producing an estimated 1.37g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.03g, network 0.28g, end-user device 1.05g.
Got: 1.37g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 164.3 kg CO2/year
With 10,000 page views per month, this page would generate approximately 164.3 kg of CO2 annually — equivalent to charging 20539 smartphones.
Info::
Green hosting reduces data center emissions
1.37g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 29% of websites
Sustainable Web Design model v4 · Page size: 5.8 MB
Your site
1.37g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.03g
Network
0.28g
End-user device
1.05g
At 10,000 monthly views: Monthly: 13.7 kg · Annual: 164.3 kg · ≈ 20539 smartphone charges
FCarbon BudgetAction71th percentileFIX
Carbon Budget
Action71th percentile
71th percentile
Warning::
1.37g 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
1.37g
71st percentile
Cleaner than 29% of websites
✗ Above the median website
vs Median 128% more
vs Target 174% 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
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 Weight96% cachedPASS
Repeat Visit Weight
96% cached
96% cached
Info::
96% reduction on repeat visits
Returning visitors download only 239 KB (vs 5923 KB first visit). 374 of 382 resources are served from browser cache, saving 1.31g CO2 per repeat visit.
Info::
Repeat visit: 0.06g CO2 (first visit: 1.37g)
First visit
5923 KB
Repeat visit
239 KB
96% reduction on repeat visits
Saving 1.31g CO2 per returning visitor
374 resources served from cache · 8 resources re-downloaded
A+Transfer Efficiency91% efficientPASS
Transfer Efficiency
91% efficient
91% efficient
Info::
Transfer efficiency: 91%
Only 532 KB of potential savings identified. Your page is well-optimized for size.
Total waste: 532 KB (9% of page weight)
Unused JS 532 KB
0.12g unnecessary CO2 per visit
Actual transfer 5923 KB
Theoretical minimum 5391 KB
Potential savings 532 KB (0.12g 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 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.