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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
88
GRADE
B
FIX
0
REVIEW
1
PASS
6
INFO
1
Device:
Mobile Desktop
Checks
8
6 PASS 1 REVIEW
B
Green Hosting
Green (hosting)
REVIEW
Green (hosting)
Info::
Oderland Webbhotell AB uses renewable energy
Info::
Oderland Webbhotell AB: Verified by the Green Web Foundation
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 Oderland Webbhotell AB✓CDN Not identified✗

Oderland Webbhotell AB: Verified by the Green Web Foundation

Based on known provider commitments. Verify at thegreenwebfoundation.org

A
CO2 Per Page Load
0.36g CO2 per view
PASS
0.36g CO2 per view
Info::
0.36g CO2 per page view
This page transfers 1.5 MB, producing an estimated 0.36g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.01g, network 0.07g, end-user device 0.28g.
Got: 0.36g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 43.3 kg CO2/year
With 10,000 page views per month, this page would generate approximately 43.3 kg of CO2 annually — equivalent to charging 5413 smartphones.
Info::
Green hosting reduces data center emissions

0.36g

Carbon Footprint per page view

✓ Below sustainability target (0.50g)

Cleaner than 74% of websites

Sustainable Web Design model v4 · Page size: 1.5 MB

Your site
0.36g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.01g
Network
0.07g
End-user device
0.28g
At 10,000 monthly views: Monthly: 3.6 kg · Annual: 43.3 kg · ≈ 5413 smartphone charges
A+
Repeat Visit Weight
97% cached
PASS
97% cached
Info::
97% reduction on repeat visits
Returning visitors download only 49 KB (vs 1561 KB first visit). 149 of 151 resources are served from browser cache, saving 0.35g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 0.36g)
First visit
1561 KB
Repeat visit
49 KB

97% reduction on repeat visits

Saving 0.35g CO2 per returning visitor

149 resources served from cache · 2 resources re-downloaded

A
Carbon Budget
26th percentile
PASS
26th percentile
Info::
0.36g CO2 — below the sustainability target of 0.50g
Cleaner than an estimated 74% of websites analyzed. This page meets the Web Sustainability Guidelines target.
Info::
Estimated 26th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website

0.36g

26th percentile

Cleaner than 74% of websites

✓ Below the Web Sustainability Guidelines target

vs Median 40% cleaner ✓
vs Target 28% cleaner ✓
A+
Transfer Efficiency
90% efficient
PASS
90% efficient
Info::
Transfer efficiency: 90%
Only 153 KB of potential savings identified. Your page is well-optimized for size.
90% efficient

Total waste: 153 KB (10% of page weight)

Unused JS 153 KB

0.04g unnecessary CO2 per visit

Actual transfer 1561 KB
Theoretical minimum 1407 KB
Potential savings 153 KB (0.04g CO2)

See Deep Analysis sections above for specific optimizations.

A+
Web Font Weight Variants
3 font weights loaded across 1 famil(y/ies) -- reasonable
PASS
3 font weights loaded across 1 famil(y/ies) -- reasonable
Info::
3 font weight(s) loaded across 1 famil(y/ies)
A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Oderland Webbhotell AB

Image Optimization
113 images, 378 KB total, 192 KB wasted
INFO

Image Optimization Audit

Total Images

113

Total Size

378 KB

Oversized

5

Wasted

192 KB

28 missing dimensions 48 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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