https://www.itssmart.it
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
92
GRADE
A
FIX
0
REVIEW
2
PASS
5
INFO
1
Checks
85 PASS 2 REVIEW
BGreen HostingGreen (hosting)REVIEW
Green Hosting
Green (hosting)
Green (hosting)
Info::
Next.js uses renewable energy
Info::
Next.js: 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 Next.js✓CDN Not identified✗
Next.js: 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.
ACO2 Per Page Load0.25g CO2 per viewPASS
CO2 Per Page Load
0.25g CO2 per view
0.25g CO2 per view
Info::
0.25g CO2 per page view
This page transfers 1.1 MB, producing an estimated 0.25g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.01g, network 0.05g, end-user device 0.20g.
Got: 0.25g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 30.5 kg CO2/year
With 10,000 page views per month, this page would generate approximately 30.5 kg of CO2 annually — equivalent to charging 3808 smartphones.
Info::
Green hosting reduces data center emissions
0.25g
Carbon Footprint per page view
✓ Below sustainability target (0.50g)
Cleaner than 85% of websites
Sustainable Web Design model v4 · Page size: 1.1 MB
Your site
0.25g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.01g
Network
0.05g
End-user device
0.20g
At 10,000 monthly views: Monthly: 2.5 kg · Annual: 30.5 kg · ≈ 3808 smartphone charges
A+Repeat Visit Weight98% cachedPASS
Repeat Visit Weight
98% cached
98% cached
Info::
98% reduction on repeat visits
Returning visitors download only 20 KB (vs 1098 KB first visit). 54 of 55 resources are served from browser cache, saving 0.25g CO2 per repeat visit.
Info::
Repeat visit: 0.00g CO2 (first visit: 0.25g)
First visit
1098 KB
Repeat visit
20 KB
98% reduction on repeat visits
Saving 0.25g CO2 per returning visitor
54 resources served from cache · 1 resources re-downloaded
ACarbon Budget15th percentilePASS
Carbon Budget
15th percentile
15th percentile
Info::
0.25g CO2 — below the sustainability target of 0.50g
Cleaner than an estimated 85% of websites analyzed. This page meets the Web Sustainability Guidelines target.
Info::
Estimated 15th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
0.25g
15th percentile
Cleaner than 85% of websites
✓ Below the Web Sustainability Guidelines target
vs Median 58% cleaner ✓
vs Target 49% cleaner ✓
A+Transfer Efficiency98% efficientPASS
Transfer Efficiency
98% efficient
98% efficient
Info::
Transfer efficiency: 98%
Only 26 KB of potential savings identified. Your page is well-optimized for size.
Total waste: 26 KB (2% of page weight)
Unused JS 26 KB
0.01g unnecessary CO2 per visit
Actual transfer 1098 KB
Theoretical minimum 1071 KB
Potential savings 26 KB (0.01g 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: Hetzner Online GmbH
Image Optimization14 images, 163 KB total, 43 KB wastedINFO
Image Optimization
14 images, 163 KB total, 43 KB wasted
Image Optimization Audit
Total Images
14
Total Size
163 KB
Oversized
1
Wasted
43 KB
10 missing dimensions 1 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.