https://Donaubad.cloud
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
90
GRADE
A
FIX
1
REVIEW
2
PASS
4
INFO
1
Checks
84 PASS 2 REVIEW 1 FIX
DGreen HostingActionUnknownFIX
Green Hosting
ActionUnknown
Unknown
Info::
Hosting provider could not be identified
Without knowing the provider, we cannot determine their energy sourcing. Check with your hosting provider about their renewable energy commitments.
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 HostingUnable to Determine
Hosting Not identified✗CDN Not identified✗
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.
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+CO2 Per Page Load0.17g CO2 per viewPASS
CO2 Per Page Load
0.17g CO2 per view
0.17g CO2 per view
Info::
0.17g CO2 per page view
This page transfers 0.6 MB, producing an estimated 0.17g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.03g, network 0.03g, end-user device 0.11g.
Got: 0.17g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 20.2 kg CO2/year
With 10,000 page views per month, this page would generate approximately 20.2 kg of CO2 annually — equivalent to charging 2523 smartphones.
0.17g
Carbon Footprint per page view
✓ Below sustainability target (0.50g)
Cleaner than 90% of websites
Sustainable Web Design model v4 · Page size: 0.6 MB
Your site
0.17g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.03g
Network
0.03g
End-user device
0.11g
At 10,000 monthly views: Monthly: 1.7 kg · Annual: 20.2 kg · ≈ 2523 smartphone charges
A+Repeat Visit Weight96% cachedPASS
Repeat Visit Weight
96% cached
96% cached
Info::
96% reduction on repeat visits
Returning visitors download only 23 KB (vs 608 KB first visit). 14 of 15 resources are served from browser cache, saving 0.16g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 0.17g)
First visit
608 KB
Repeat visit
23 KB
96% reduction on repeat visits
Saving 0.16g CO2 per returning visitor
14 resources served from cache · 1 resources re-downloaded
A+Carbon Budget10th percentilePASS
Carbon Budget
10th percentile
10th percentile
Info::
0.17g CO2 — below the sustainability target of 0.50g
Cleaner than an estimated 90% of websites analyzed. This page meets the Web Sustainability Guidelines target.
Info::
Estimated 10th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
0.17g
10th percentile
Cleaner than 90% of websites
✓ Below the Web Sustainability Guidelines target
vs Median 72% cleaner ✓
vs Target 66% cleaner ✓
A+Transfer Efficiency92% efficientPASS
Transfer Efficiency
92% efficient
92% efficient
Info::
Transfer efficiency: 92%
Only 45 KB of potential savings identified. Your page is well-optimized for size.
Total waste: 45 KB (8% of page weight)
Unused JS 45 KB
0.01g unnecessary CO2 per visit
Actual transfer 608 KB
Theoretical minimum 562 KB
Potential savings 45 KB (0.01g CO2)
See Deep Analysis sections above for specific optimizations.
Image Optimization1 images, 75 KB total, 0 KB wastedINFO
Image Optimization
1 images, 75 KB total, 0 KB wasted
Image Optimization Audit
Total Images
1
Total Size
75 KB
1 missing alt text
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.