https://www.appsero.site
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
CWeb Font Weight VariantsAction10 font weights loaded across 3 famil(y/ies)REVIEW
Web Font Weight Variants
Action10 font weights loaded across 3 famil(y/ies)
10 font weights loaded across 3 famil(y/ies)
Warning::
10 font weights loaded -- likely 100+ KB of unused payload
Loading 10 font weights typically transfers 200-400 KB just for fonts. Most pages legitimately use 2-3 weights (regular + bold, maybe medium). Audit which weights your stylesheet actually applies and trim the Google Fonts URL accordingly. Affected families: Cormorant Garamond, Fraunces, Inter.
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+CO2 Per Page Load0.12g CO2 per viewPASS
CO2 Per Page Load
0.12g CO2 per view
0.12g CO2 per view
Info::
0.12g CO2 per page view
This page transfers 0.5 MB, producing an estimated 0.12g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.00g, network 0.03g, end-user device 0.10g.
Got: 0.12g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 14.9 kg CO2/year
With 10,000 page views per month, this page would generate approximately 14.9 kg of CO2 annually — equivalent to charging 1867 smartphones.
Info::
Green hosting reduces data center emissions
0.12g
Carbon Footprint per page view
✓ Below sustainability target (0.50g)
Cleaner than 90% of websites
Sustainable Web Design model v4 · Page size: 0.5 MB
Your site
0.12g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.00g
Network
0.03g
End-user device
0.10g
At 10,000 monthly views: Monthly: 1.2 kg · Annual: 14.9 kg · ≈ 1867 smartphone charges
AGreen HostingGreen (cdn)PASS
Green Hosting
Green (cdn)
Green (cdn)
Info::
Netlify CDN uses renewable energy
Since most traffic is served through the CDN, the majority of data transfer energy is renewable.
Info::
Netlify: Hosted on AWS/Google Cloud with renewable energy matching
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 Not identified✗CDN Netlify✓
Netlify: Hosted on AWS/Google Cloud with renewable energy matching
Based on known provider commitments. Verify at thegreenwebfoundation.org
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 538 KB first visit). 15 of 16 resources are served from browser cache, saving 0.12g CO2 per repeat visit.
Info::
Repeat visit: 0.00g CO2 (first visit: 0.12g)
First visit
538 KB
Repeat visit
0 KB
100% reduction on repeat visits
Saving 0.12g CO2 per returning visitor
15 resources served from cache · 1 resources re-downloaded
A+Carbon Budget10th percentilePASS
Carbon Budget
10th percentile
10th percentile
Info::
0.12g CO2 — below the sustainability target of 0.50g
Cleaner than an estimated 90% of websites analyzed. This page meets the Web Sustainability Guidelines target.
Info::
Estimated 10th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
0.12g
10th percentile
Cleaner than 90% of websites
✓ Below the Web Sustainability Guidelines target
vs Median 79% cleaner ✓
vs Target 75% cleaner ✓
A+Transfer Efficiency93% efficientPASS
Transfer Efficiency
93% efficient
93% efficient
Info::
Transfer efficiency: 93%
Only 35 KB of potential savings identified. Your page is well-optimized for size.
Total waste: 35 KB (7% of page weight)
Unused JS 35 KB
0.01g unnecessary CO2 per visit
Actual transfer 538 KB
Theoretical minimum 503 KB
Potential savings 35 KB (0.01g CO2)
See Deep Analysis sections above for specific optimizations.
Image Optimization34 images, 0 KB total, 0 KB wastedINFO
Image Optimization
34 images, 0 KB total, 0 KB wasted
Image Optimization Audit
Total Images
34
Total Size
0 KB
34 missing dimensions
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.