https://la7.it
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
66
GRADE
D
FIX
2
REVIEW
2
PASS
3
INFO
1
Checks
83 PASS 2 REVIEW 2 FIX
FCO2 Per Page LoadAction7.41g CO2 per viewFIX
CO2 Per Page Load
Action7.41g CO2 per view
7.41g CO2 per view
Critical::
7.41g CO2 per page view
This page transfers 31.3 MB, producing an estimated 7.41g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.19g, network 1.53g, end-user device 5.69g.
Got: 7.41g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 888.8 kg CO2/year
With 10,000 page views per month, this page would generate approximately 888.8 kg of CO2 annually — equivalent to charging 111097 smartphones.
Info::
Green hosting reduces data center emissions
7.41g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 5% of websites
Sustainable Web Design model v4 · Page size: 31.3 MB
Your site
7.41g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.19g
Network
1.53g
End-user device
5.69g
At 10,000 monthly views: Monthly: 74.1 kg · Annual: 888.8 kg · ≈ 111097 smartphone charges
FCarbon BudgetAction95th percentileFIX
Carbon Budget
Action95th percentile
95th percentile
Warning::
7.41g CO2 — above the median website (0.60g)
Heavier than an estimated 5% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 95th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
7.41g
95th percentile
Cleaner than 5% of websites
✗ Above the median website
vs Median 1134% more
vs Target 1381% more
BGreen HostingGreen (hosting)REVIEW
Green Hosting
Green (hosting)
Green (hosting)
Info::
Aruba.it uses renewable energy
Info::
Aruba.it: Verified by the Green Web Foundation
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 Hosting✓ Green Hosted
Hosting Aruba.it✓CDN Not identified✗
Aruba.it: Verified by the Green Web Foundation
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.
A+Repeat Visit Weight99% cachedPASS
Repeat Visit Weight
99% cached
99% cached
Info::
99% reduction on repeat visits
Returning visitors download only 165 KB (vs 32043 KB first visit). 226 of 231 resources are served from browser cache, saving 7.37g CO2 per repeat visit.
Info::
Repeat visit: 0.04g CO2 (first visit: 7.41g)
First visit
32043 KB
Repeat visit
165 KB
99% reduction on repeat visits
Saving 7.37g CO2 per returning visitor
226 resources served from cache · 5 resources re-downloaded
A+Transfer Efficiency97% efficientPASS
Transfer Efficiency
97% efficient
97% efficient
Info::
Transfer efficiency: 97%
Only 1068 KB of potential savings identified. Your page is well-optimized for size.
Total waste: 1068 KB (3% of page weight)
Unused JS 1068 KB
0.25g unnecessary CO2 per visit
Actual transfer 32043 KB
Theoretical minimum 30974 KB
Potential savings 1068 KB (0.25g CO2)
See Deep Analysis sections above for specific optimizations.
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
Whether the site is served from green-energy infrastructure
Green Hosting
This site is hosted on green energy infrastructure
Provider: Aruba.it
Image Optimization15 images, 2699 KB total, 0 KB wastedINFO
Image Optimization
15 images, 2699 KB total, 0 KB wasted
Image Optimization Audit
Total Images
15
Total Size
2699 KB
13 missing alt text 15 missing dimensions 14 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.