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https://fudinoo.hu

Sustainability

· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.
SCORE
76
GRADE
C
FIX
1
REVIEW
3
PASS
3
INFO
1
Device:
Mobile Desktop
Checks
8
3 PASS 3 REVIEW 1 FIX
D
Green Hosting
Action
Not green
FIX
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 Apache HTTP Server✗CDN Not identified✗

Based on known provider commitments. Verify at thegreenwebfoundation.org

C
Transfer Efficiency
Action
73% efficient
REVIEW
73% efficient
Warning::
Transfer efficiency: 73%
An estimated 287 KB (27%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 287 KB of unused JavaScript. This wasted data produces 0.08g of unnecessary CO2 per page view.
73% efficient

Total waste: 287 KB (27% of page weight)

Unused JS 287 KB

0.08g unnecessary CO2 per visit

Actual transfer 1079 KB
Theoretical minimum 791 KB
Potential savings 287 KB (0.08g CO2)

See Deep Analysis sections above for specific optimizations.

B
Web Font Weight Variants
No detectable Google Fonts weights
REVIEW
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.
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A
CO2 Per Page Load
0.30g CO2 per view
PASS
0.30g CO2 per view
Info::
0.30g CO2 per page view
This page transfers 1.1 MB, producing an estimated 0.30g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.06g, network 0.05g, end-user device 0.19g.
Got: 0.30g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 35.8 kg CO2/year
With 10,000 page views per month, this page would generate approximately 35.8 kg of CO2 annually — equivalent to charging 4478 smartphones.

0.30g

Carbon Footprint per page view

✓ Below sustainability target (0.50g)

Cleaner than 81% of websites

Sustainable Web Design model v4 · Page size: 1.1 MB

Your site
0.30g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.06g
Network
0.05g
End-user device
0.19g
At 10,000 monthly views: Monthly: 3.0 kg · Annual: 35.8 kg · ≈ 4478 smartphone charges
A+
Repeat Visit Weight
98% cached
PASS
98% cached
Info::
98% reduction on repeat visits
Returning visitors download only 16 KB (vs 1079 KB first visit). 37 of 38 resources are served from browser cache, saving 0.29g CO2 per repeat visit.
Info::
Repeat visit: 0.00g CO2 (first visit: 0.30g)
First visit
1079 KB
Repeat visit
16 KB

98% reduction on repeat visits

Saving 0.29g CO2 per returning visitor

37 resources served from cache · 1 resources re-downloaded

A
Carbon Budget
19th percentile
PASS
19th percentile
Info::
0.30g CO2 — below the sustainability target of 0.50g
Cleaner than an estimated 81% of websites analyzed. This page meets the Web Sustainability Guidelines target.
Info::
Estimated 19th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website

0.30g

19th percentile

Cleaner than 81% of websites

✓ Below the Web Sustainability Guidelines target

vs Median 50% cleaner ✓
vs Target 40% cleaner ✓
Image Optimization
31 images, 376 KB total, 76 KB wasted
INFO

Image Optimization Audit

Total Images

31

Total Size

376 KB

Oversized

7

Wasted

76 KB

4 missing dimensions 29 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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