https://avilon.ru
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
61
GRADE
D
FIX
3
REVIEW
3
PASS
1
INFO
1
Checks
81 PASS 3 REVIEW 3 FIX
FCO2 Per Page LoadAction1.85g CO2 per viewFIX
CO2 Per Page Load
Action1.85g CO2 per view
1.85g CO2 per view
Warning::
1.85g CO2 per page view
This page transfers 6.5 MB, producing an estimated 1.85g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.34g, network 0.32g, end-user device 1.19g.
Got: 1.85g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 221.5 kg CO2/year
With 10,000 page views per month, this page would generate approximately 221.5 kg of CO2 annually — equivalent to charging 27690 smartphones.
1.85g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 15% of websites
Sustainable Web Design model v4 · Page size: 6.5 MB
Your site
1.85g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.34g
Network
0.32g
End-user device
1.19g
At 10,000 monthly views: Monthly: 18.5 kg · Annual: 221.5 kg · ≈ 27690 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
FCarbon BudgetAction85th percentileFIX
Carbon Budget
Action85th percentile
85th percentile
Warning::
1.85g CO2 — above the median website (0.60g)
Heavier than an estimated 15% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 85th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
1.85g
85th percentile
Cleaner than 15% of websites
✗ Above the median website
vs Median 208% more
vs Target 269% more
BTransfer Efficiency89% efficientREVIEW
Transfer Efficiency
89% efficient
89% efficient
Info::
Transfer efficiency: 89%
An estimated 703 KB (11%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 703 KB of unused JavaScript. This wasted data produces 0.19g of unnecessary CO2 per page view.
Total waste: 703 KB (11% of page weight)
Unused JS 703 KB
0.19g unnecessary CO2 per visit
Actual transfer 6674 KB
Theoretical minimum 5971 KB
Potential savings 703 KB (0.19g 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.
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 Weight97% cachedPASS
Repeat Visit Weight
97% cached
97% cached
Info::
97% reduction on repeat visits
Returning visitors download only 181 KB (vs 6674 KB first visit). 242 of 247 resources are served from browser cache, saving 1.80g CO2 per repeat visit.
Info::
Repeat visit: 0.05g CO2 (first visit: 1.85g)
First visit
6674 KB
Repeat visit
181 KB
97% reduction on repeat visits
Saving 1.80g CO2 per returning visitor
242 resources served from cache · 5 resources re-downloaded
Image Optimization200 images, 5 KB total, 0 KB wastedINFO
Image Optimization
200 images, 5 KB total, 0 KB wasted
Image Optimization Audit
Total Images
200
Total Size
5 KB
Oversized
44
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.