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https://domradar.com

Sustainability

· 7 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.
SCORE
85
GRADE
B
FIX
1
REVIEW
2
PASS
4
INFO
0
Device:
Mobile Desktop
Checks
7
4 PASS 2 REVIEW 1 FIX
D
Green Hosting
Action
Unknown
FIX
Unknown
Info::
Hosting provider could not be identified
Without knowing the provider, we cannot determine their energy sourcing. Check with your hosting provider about their renewable energy commitments.
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 HostingUnable to Determine
Hosting Not identified✗CDN Not identified✗

Based on known provider commitments. Verify at thegreenwebfoundation.org

B
Web Font Weight Variants
No detectable Google Fonts weights
REVIEW
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.
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A
CO2 Per Page Load
0.26g CO2 per view
PASS
0.26g CO2 per view
Info::
0.26g CO2 per page view
This page transfers 0.9 MB, producing an estimated 0.26g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.05g, network 0.04g, end-user device 0.16g.
Got: 0.26g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 30.6 kg CO2/year
With 10,000 page views per month, this page would generate approximately 30.6 kg of CO2 annually — equivalent to charging 3827 smartphones.

0.26g

Carbon Footprint per page view

✓ Below sustainability target (0.50g)

Cleaner than 85% of websites

Sustainable Web Design model v4 · Page size: 0.9 MB

Your site
0.26g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.05g
Network
0.04g
End-user device
0.16g
At 10,000 monthly views: Monthly: 2.6 kg · Annual: 30.6 kg · ≈ 3827 smartphone charges
A+
Repeat Visit Weight
93% cached
PASS
93% cached
Info::
93% reduction on repeat visits
Returning visitors download only 68 KB (vs 922 KB first visit). 68 of 70 resources are served from browser cache, saving 0.24g CO2 per repeat visit.
Info::
Repeat visit: 0.02g CO2 (first visit: 0.26g)
First visit
922 KB
Repeat visit
68 KB

93% reduction on repeat visits

Saving 0.24g CO2 per returning visitor

68 resources served from cache · 2 resources re-downloaded

A
Carbon Budget
15th percentile
PASS
15th percentile
Info::
0.26g CO2 — below the sustainability target of 0.50g
Cleaner than an estimated 85% of websites analyzed. This page meets the Web Sustainability Guidelines target.
Info::
Estimated 15th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website

0.26g

15th percentile

Cleaner than 85% of websites

✓ Below the Web Sustainability Guidelines target

vs Median 57% cleaner ✓
vs Target 49% cleaner ✓
A+
Transfer Efficiency
90% efficient
PASS
90% efficient
Info::
Transfer efficiency: 90%
Only 88 KB of potential savings identified. Your page is well-optimized for size.
90% efficient

Total waste: 88 KB (10% of page weight)

Unused JS 88 KB

0.02g unnecessary CO2 per visit

Actual transfer 922 KB
Theoretical minimum 834 KB
Potential savings 88 KB (0.02g CO2)

See Deep Analysis sections above for specific optimizations.

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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