https://weknowporn.com
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
81
GRADE
B
FIX
1
REVIEW
3
PASS
3
INFO
1
Checks
83 PASS 3 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
BTransfer Efficiency85% efficientREVIEW
Transfer Efficiency
85% efficient
85% efficient
Info::
Transfer efficiency: 85%
An estimated 126 KB (15%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 126 KB of unused JavaScript. This wasted data produces 0.03g of unnecessary CO2 per page view.
Total waste: 126 KB (15% of page weight)
Unused JS 126 KB
0.03g unnecessary CO2 per visit
Actual transfer 830 KB
Theoretical minimum 703 KB
Potential savings 126 KB (0.03g 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 Load0.23g CO2 per viewPASS
CO2 Per Page Load
0.23g CO2 per view
0.23g CO2 per view
Info::
0.23g CO2 per page view
This page transfers 0.8 MB, producing an estimated 0.23g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.04g, network 0.04g, end-user device 0.15g.
Got: 0.23g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 27.6 kg CO2/year
With 10,000 page views per month, this page would generate approximately 27.6 kg of CO2 annually — equivalent to charging 3443 smartphones.
0.23g
Carbon Footprint per page view
✓ Below sustainability target (0.50g)
Cleaner than 88% of websites
Sustainable Web Design model v4 · Page size: 0.8 MB
Your site
0.23g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.04g
Network
0.04g
End-user device
0.15g
At 10,000 monthly views: Monthly: 2.3 kg · Annual: 27.6 kg · ≈ 3443 smartphone charges
A+Repeat Visit Weight94% cachedPASS
Repeat Visit Weight
94% cached
94% cached
Info::
94% reduction on repeat visits
Returning visitors download only 52 KB (vs 830 KB first visit). 181 of 182 resources are served from browser cache, saving 0.22g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 0.23g)
First visit
830 KB
Repeat visit
52 KB
94% reduction on repeat visits
Saving 0.22g CO2 per returning visitor
181 resources served from cache · 1 resources re-downloaded
ACarbon Budget12th percentilePASS
Carbon Budget
12th percentile
12th percentile
Info::
0.23g CO2 — below the sustainability target of 0.50g
Cleaner than an estimated 88% of websites analyzed. This page meets the Web Sustainability Guidelines target.
Info::
Estimated 12th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
0.23g
12th percentile
Cleaner than 88% of websites
✓ Below the Web Sustainability Guidelines target
vs Median 62% cleaner ✓
vs Target 54% cleaner ✓
Image Optimization149 images, 283 KB total, 0 KB wastedINFO
Image Optimization
149 images, 283 KB total, 0 KB wasted
Image Optimization Audit
Total Images
149
Total Size
283 KB
143 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.