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https://alexlegend.com

Sustainability

· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.
SCORE
68
GRADE
D
FIX
3
REVIEW
2
PASS
2
INFO
1
Device:
Mobile Desktop
Checks
8
2 PASS 2 REVIEW 3 FIX
D
CO2 Per Page Load
Action
0.95g CO2 per view
FIX
0.95g CO2 per view
Info::
0.95g CO2 per page view
This page transfers 3.4 MB, producing an estimated 0.95g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.18g, network 0.16g, end-user device 0.61g.
Got: 0.95g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 114.2 kg CO2/year
With 10,000 page views per month, this page would generate approximately 114.2 kg of CO2 annually — equivalent to charging 14277 smartphones.

0.95g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 40% of websites

Sustainable Web Design model v4 · Page size: 3.4 MB

Your site
0.95g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.18g
Network
0.16g
End-user device
0.61g
At 10,000 monthly views: Monthly: 9.5 kg · Annual: 114.2 kg · ≈ 14277 smartphone charges
D
Green Hosting
Action
Not green
FIX
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 Apache HTTP Server✗CDN Not identified✗

Based on known provider commitments. Verify at thegreenwebfoundation.org

D
Carbon Budget
Action
60th percentile
FIX
60th percentile
Warning::
0.95g CO2 — above the median website (0.60g)
Heavier than an estimated 40% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 60th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website

0.95g

60th percentile

Cleaner than 40% of websites

✗ Above the median website

vs Median 59% more
vs Target 90% more
C
Web Font Weight Variants
Action
16 font weights loaded across 4 famil(y/ies)
REVIEW
16 font weights loaded across 4 famil(y/ies)
Warning::
16 font weights loaded -- likely 100+ KB of unused payload
Loading 16 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: Exo 2, Montserrat, Open Sans, Roboto.
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Repeat Visit Weight
97% cached
PASS
97% cached
Info::
97% reduction on repeat visits
Returning visitors download only 90 KB (vs 3441 KB first visit). 85 of 86 resources are served from browser cache, saving 0.93g CO2 per repeat visit.
Info::
Repeat visit: 0.03g CO2 (first visit: 0.95g)
First visit
3441 KB
Repeat visit
90 KB

97% reduction on repeat visits

Saving 0.93g CO2 per returning visitor

85 resources served from cache · 1 resources re-downloaded

A+
Transfer Efficiency
98% efficient
PASS
98% efficient
Info::
Transfer efficiency: 98%
Only 69 KB of potential savings identified. Your page is well-optimized for size.
98% efficient

Total waste: 69 KB (2% of page weight)

Unused JS 69 KB

0.02g unnecessary CO2 per visit

Actual transfer 3441 KB
Theoretical minimum 3371 KB
Potential savings 69 KB (0.02g CO2)

See Deep Analysis sections above for specific optimizations.

Image Optimization
17 images, 2223 KB total, 2037 KB wasted
INFO

Image Optimization Audit

Total Images

17

Total Size

2223 KB

Oversized

4

Wasted

2037 KB

2 missing alt text 15 missing dimensions 15 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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