https://it.swiftsignbm.com
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
61
GRADE
D
FIX
3
REVIEW
2
PASS
2
INFO
1
Checks
82 PASS 2 REVIEW 3 FIX
FCO2 Per Page LoadAction3.74g CO2 per viewFIX
CO2 Per Page Load
Action3.74g CO2 per view
3.74g CO2 per view
Critical::
3.74g CO2 per page view
This page transfers 13.2 MB, producing an estimated 3.74g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.69g, network 0.65g, end-user device 2.40g.
Got: 3.74g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 449.2 kg CO2/year
With 10,000 page views per month, this page would generate approximately 449.2 kg of CO2 annually — equivalent to charging 56147 smartphones.
3.74g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 5% of websites
Sustainable Web Design model v4 · Page size: 13.2 MB
Your site
3.74g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.69g
Network
0.65g
End-user device
2.40g
At 10,000 monthly views: Monthly: 37.4 kg · Annual: 449.2 kg · ≈ 56147 smartphone charges
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
FCarbon BudgetAction95th percentileFIX
Carbon Budget
Action95th percentile
95th percentile
Warning::
3.74g 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
3.74g
95th percentile
Cleaner than 5% of websites
✗ Above the median website
vs Median 524% more
vs Target 649% more
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+Repeat Visit Weight100% cachedPASS
Repeat Visit Weight
100% cached
100% cached
Info::
100% reduction on repeat visits
Returning visitors download only 0 KB (vs 13534 KB first visit). 97 of 98 resources are served from browser cache, saving 3.74g CO2 per repeat visit.
Info::
Repeat visit: 0.00g CO2 (first visit: 3.74g)
First visit
13534 KB
Repeat visit
0 KB
100% reduction on repeat visits
Saving 3.74g CO2 per returning visitor
97 resources served from cache · 1 resources re-downloaded
A+Transfer Efficiency99% efficientPASS
Transfer Efficiency
99% efficient
99% efficient
Info::
Transfer efficiency: 99%
Only 77 KB of potential savings identified. Your page is well-optimized for size.
Total waste: 77 KB (1% of page weight)
Unused JS 77 KB
0.02g unnecessary CO2 per visit
Actual transfer 13534 KB
Theoretical minimum 13456 KB
Potential savings 77 KB (0.02g CO2)
See Deep Analysis sections above for specific optimizations.
Image Optimization74 images, 5630 KB total, 4899 KB wastedINFO
Image Optimization
74 images, 5630 KB total, 4899 KB wasted
Image Optimization Audit
Total Images
74
Total Size
5630 KB
Oversized
46
Wasted
4899 KB
74 missing dimensions 72 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.