https://asroma.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
3
PASS
1
INFO
1
Checks
81 PASS 3 REVIEW 3 FIX
FCO2 Per Page LoadAction1.56g CO2 per viewFIX
CO2 Per Page Load
Action1.56g CO2 per view
1.56g CO2 per view
Warning::
1.56g CO2 per page view
This page transfers 5.5 MB, producing an estimated 1.56g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.29g, network 0.27g, end-user device 1.00g.
Got: 1.56g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 187.6 kg CO2/year
With 10,000 page views per month, this page would generate approximately 187.6 kg of CO2 annually — equivalent to charging 23450 smartphones.
1.56g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 23% of websites
Sustainable Web Design model v4 · Page size: 5.5 MB
Your site
1.56g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.29g
Network
0.27g
End-user device
1.00g
At 10,000 monthly views: Monthly: 15.6 kg · Annual: 187.6 kg · ≈ 23450 smartphone charges
DGreen HostingActionNot greenFIX
Green Hosting
ActionNot green
Not green
Info::
No confirmed renewable energy commitment detected
Consider providers like Cloudflare, Google Cloud, or Vercel that match 100% of their energy use with renewables.
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 HostingNot Green Hosted
Hosting Amazon Web Services✗CDN Not identified✗
Based on known provider commitments. Verify at thegreenwebfoundation.org
FCarbon BudgetAction77th percentileFIX
Carbon Budget
Action77th percentile
77th percentile
Warning::
1.56g CO2 — above the median website (0.60g)
Heavier than an estimated 23% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 77th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
1.56g
77th percentile
Cleaner than 23% of websites
✗ Above the median website
vs Median 161% more
vs Target 213% more
BTransfer Efficiency90% efficientREVIEW
Transfer Efficiency
90% efficient
90% efficient
Info::
Transfer efficiency: 90%
An estimated 591 KB (10%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 591 KB of unused JavaScript. This wasted data produces 0.16g of unnecessary CO2 per page view.
Total waste: 591 KB (10% of page weight)
Unused JS 591 KB
0.16g unnecessary CO2 per visit
Actual transfer 5652 KB
Theoretical minimum 5061 KB
Potential savings 591 KB (0.16g 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
A+Repeat Visit Weight98% cachedPASS
Repeat Visit Weight
98% cached
98% cached
Info::
98% reduction on repeat visits
Returning visitors download only 112 KB (vs 5652 KB first visit). 202 of 208 resources are served from browser cache, saving 1.53g CO2 per repeat visit.
Info::
Repeat visit: 0.03g CO2 (first visit: 1.56g)
First visit
5652 KB
Repeat visit
112 KB
98% reduction on repeat visits
Saving 1.53g CO2 per returning visitor
202 resources served from cache · 6 resources re-downloaded
Image Optimization165 images, 0 KB total, 0 KB wastedINFO
Image Optimization
165 images, 0 KB total, 0 KB wasted
Image Optimization Audit
Total Images
165
Total Size
0 KB
Oversized
9
2 missing alt text 165 missing dimensions 78 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.