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Sustainability

· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.
SCORE
77
GRADE
C
FIX
1
REVIEW
3
PASS
3
INFO
1
Device:
Mobile Desktop
Checks
8
3 PASS 3 REVIEW 1 FIX
D
Transfer Efficiency
Action
50% efficient
FIX
50% efficient
Warning::
Transfer efficiency: 50%
An estimated 1117 KB (50%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 1117 KB of unused JavaScript. This wasted data produces 0.26g of unnecessary CO2 per page view.
50% efficient

Total waste: 1117 KB (50% of page weight)

Unused JS 1117 KB

0.26g unnecessary CO2 per visit

Actual transfer 2242 KB
Theoretical minimum 1124 KB
Potential savings 1117 KB (0.26g CO2)

See Deep Analysis sections above for specific optimizations.

B
CO2 Per Page Load
0.52g CO2 per view
REVIEW
0.52g CO2 per view
Info::
0.52g CO2 per page view
This page transfers 2.2 MB, producing an estimated 0.52g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.01g, network 0.11g, end-user device 0.40g.
Got: 0.52g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 62.2 kg CO2/year
With 10,000 page views per month, this page would generate approximately 62.2 kg of CO2 annually — equivalent to charging 7774 smartphones.
Info::
Green hosting reduces data center emissions

0.52g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 59% of websites

Sustainable Web Design model v4 · Page size: 2.2 MB

Your site
0.52g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.01g
Network
0.11g
End-user device
0.40g
At 10,000 monthly views: Monthly: 5.2 kg · Annual: 62.2 kg · ≈ 7774 smartphone charges
B
Carbon Budget
41th percentile
REVIEW
41th percentile
Info::
0.52g CO2 — below the median website (0.60g)
Better than an estimated 59% of websites, but above the sustainability target of 0.50g. Reducing page weight would help reach the target.
Info::
Estimated 41th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website

0.52g

41st percentile

Cleaner than 59% of websites

✗ Above the median website

vs Median 14% cleaner ✓
vs Target 4% more
C
Web Font Weight Variants
Action
9 font weights loaded across 1 famil(y/ies)
REVIEW
9 font weights loaded across 1 famil(y/ies)
Warning::
9 font weights loaded -- likely 100+ KB of unused payload
Loading 9 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: Poppins.
A+
Green Hosting
Green (both)
PASS
Green (both)
Info::
Both hosting and CDN use renewable energy
Got: Hosting: Cloudflare, CDN: Cloudflare
Info::
Cloudflare: Verified by the Green Web Foundation
Info::
Cloudflare: 100% renewable energy for global network since 2019
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 Cloudflare✓CDN Cloudflare✓

Cloudflare: Verified by the Green Web Foundation

Cloudflare: 100% renewable energy for global network since 2019

Based on known provider commitments. Verify at thegreenwebfoundation.org

A+
Repeat Visit Weight
98% cached
PASS
98% cached
Info::
98% reduction on repeat visits
Returning visitors download only 50 KB (vs 2242 KB first visit). 71 of 74 resources are served from browser cache, saving 0.51g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 0.52g)
First visit
2242 KB
Repeat visit
50 KB

98% reduction on repeat visits

Saving 0.51g CO2 per returning visitor

71 resources served from cache · 3 resources re-downloaded

A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Cloudflare

Image Optimization
34 images, 60 KB total, 0 KB wasted
INFO

Image Optimization Audit

Total Images

34

Total Size

60 KB

21 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.

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