https://ibtimes.co.uk
Sustainability
· 6 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
90
GRADE
A
FIX
1
REVIEW
1
PASS
4
INFO
0
Checks
64 PASS 1 REVIEW 1 FIX
DGreen HostingActionUnknownFIX
Green Hosting
ActionUnknown
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
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 Load0.16g CO2 per viewPASS
CO2 Per Page Load
0.16g CO2 per view
0.16g CO2 per view
Info::
0.16g CO2 per page view
This page transfers 0.6 MB, producing an estimated 0.16g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.03g, network 0.03g, end-user device 0.10g.
Got: 0.16g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 18.8 kg CO2/year
With 10,000 page views per month, this page would generate approximately 18.8 kg of CO2 annually — equivalent to charging 2350 smartphones.
0.16g
Carbon Footprint per page view
✓ Below sustainability target (0.50g)
Cleaner than 90% of websites
Sustainable Web Design model v4 · Page size: 0.6 MB
Your site
0.16g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.03g
Network
0.03g
End-user device
0.10g
At 10,000 monthly views: Monthly: 1.6 kg · Annual: 18.8 kg · ≈ 2350 smartphone charges
A+Repeat Visit Weight91% cachedPASS
Repeat Visit Weight
91% cached
91% cached
Info::
91% reduction on repeat visits
Returning visitors download only 52 KB (vs 566 KB first visit). 40 of 41 resources are served from browser cache, saving 0.14g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 0.16g)
First visit
566 KB
Repeat visit
52 KB
91% reduction on repeat visits
Saving 0.14g CO2 per returning visitor
40 resources served from cache · 1 resources re-downloaded
A+Carbon Budget10th percentilePASS
Carbon Budget
10th percentile
10th percentile
Info::
0.16g 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
0.16g
10th percentile
Cleaner than 90% of websites
✓ Below the Web Sustainability Guidelines target
vs Median 74% cleaner ✓
vs Target 69% cleaner ✓
A+Transfer Efficiency95% efficientPASS
Transfer Efficiency
95% efficient
95% efficient
Info::
Transfer efficiency: 95%
Only 30 KB of potential savings identified. Your page is well-optimized for size.
Total waste: 30 KB (5% of page weight)
Unused JS 30 KB
0.01g unnecessary CO2 per visit
Actual transfer 566 KB
Theoretical minimum 535 KB
Potential savings 30 KB (0.01g 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.