https://dev.xn--80avc2av3a.xn--p1ai
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
79
GRADE
C
FIX
1
REVIEW
4
PASS
2
INFO
1
Checks
82 PASS 4 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
BCarbon Budget38th percentileREVIEW
Carbon Budget
38th percentile
38th percentile
Info::
0.48g CO2 — below the sustainability target of 0.50g
Cleaner than an estimated 62% of websites analyzed. This page meets the Web Sustainability Guidelines target.
Info::
Estimated 38th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
0.48g
38th percentile
Cleaner than 62% of websites
✓ Below the Web Sustainability Guidelines target
vs Median 19% cleaner ✓
vs Target 3% cleaner ✓
BTransfer Efficiency85% efficientREVIEW
Transfer Efficiency
85% efficient
85% efficient
Info::
Transfer efficiency: 85%
An estimated 254 KB (15%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 254 KB of unused JavaScript. This wasted data produces 0.07g of unnecessary CO2 per page view.
Total waste: 254 KB (15% of page weight)
Unused JS 254 KB
0.07g unnecessary CO2 per visit
Actual transfer 1747 KB
Theoretical minimum 1493 KB
Potential savings 254 KB (0.07g 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
ACO2 Per Page Load0.48g CO2 per viewPASS
CO2 Per Page Load
0.48g CO2 per view
0.48g CO2 per view
Info::
0.48g CO2 per page view
This page transfers 1.7 MB, producing an estimated 0.48g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.09g, network 0.08g, end-user device 0.31g.
Got: 0.48g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 58.0 kg CO2/year
With 10,000 page views per month, this page would generate approximately 58.0 kg of CO2 annually — equivalent to charging 7251 smartphones.
0.48g
Carbon Footprint per page view
✓ Below sustainability target (0.50g)
Cleaner than 62% of websites
Sustainable Web Design model v4 · Page size: 1.7 MB
Your site
0.48g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.09g
Network
0.08g
End-user device
0.31g
At 10,000 monthly views: Monthly: 4.8 kg · Annual: 58.0 kg · ≈ 7251 smartphone charges
A+Repeat Visit Weight93% cachedPASS
Repeat Visit Weight
93% cached
93% cached
Info::
93% reduction on repeat visits
Returning visitors download only 124 KB (vs 1747 KB first visit). 44 of 45 resources are served from browser cache, saving 0.45g CO2 per repeat visit.
Info::
Repeat visit: 0.03g CO2 (first visit: 0.48g)
First visit
1747 KB
Repeat visit
124 KB
93% reduction on repeat visits
Saving 0.45g CO2 per returning visitor
44 resources served from cache · 1 resources re-downloaded
Image Optimization200 images, 198 KB total, 0 KB wastedINFO
Image Optimization
200 images, 198 KB total, 0 KB wasted
Image Optimization Audit
Total Images
200
Total Size
198 KB
25 missing dimensions 192 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.