https://hongbosign.com
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
73
GRADE
C
FIX
2
REVIEW
3
PASS
2
INFO
1
Checks
82 PASS 3 REVIEW 2 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
DCarbon BudgetAction55th percentileFIX
Carbon Budget
Action55th percentile
55th percentile
Warning::
0.78g CO2 — above the median website (0.60g)
Heavier than an estimated 45% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 55th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
0.78g
55th percentile
Cleaner than 45% of websites
✗ Above the median website
vs Median 30% more
vs Target 57% more
BCO2 Per Page Load0.78g CO2 per viewREVIEW
CO2 Per Page Load
0.78g CO2 per view
0.78g CO2 per view
Info::
0.78g CO2 per page view
This page transfers 2.8 MB, producing an estimated 0.78g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.14g, network 0.14g, end-user device 0.50g.
Got: 0.78g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 93.9 kg CO2/year
With 10,000 page views per month, this page would generate approximately 93.9 kg of CO2 annually — equivalent to charging 11739 smartphones.
0.78g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 45% of websites
Sustainable Web Design model v4 · Page size: 2.8 MB
Your site
0.78g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.14g
Network
0.14g
End-user device
0.50g
At 10,000 monthly views: Monthly: 7.8 kg · Annual: 93.9 kg · ≈ 11739 smartphone charges
CWeb Font Weight VariantsAction13 font weights loaded across 3 famil(y/ies)REVIEW
Web Font Weight Variants
Action13 font weights loaded across 3 famil(y/ies)
13 font weights loaded across 3 famil(y/ies)
Warning::
13 font weights loaded -- likely 100+ KB of unused payload
Loading 13 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: Inter, Inter Tight, Roboto.
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+Repeat Visit Weight98% cachedPASS
Repeat Visit Weight
98% cached
98% cached
Info::
98% reduction on repeat visits
Returning visitors download only 52 KB (vs 2829 KB first visit). 105 of 106 resources are served from browser cache, saving 0.77g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 0.78g)
First visit
2829 KB
Repeat visit
52 KB
98% reduction on repeat visits
Saving 0.77g CO2 per returning visitor
105 resources served from cache · 1 resources re-downloaded
A+Transfer Efficiency91% efficientPASS
Transfer Efficiency
91% efficient
91% efficient
Info::
Transfer efficiency: 91%
Only 258 KB of potential savings identified. Your page is well-optimized for size.
Total waste: 258 KB (9% of page weight)
Unused JS 258 KB
0.07g unnecessary CO2 per visit
Actual transfer 2829 KB
Theoretical minimum 2571 KB
Potential savings 258 KB (0.07g CO2)
See Deep Analysis sections above for specific optimizations.
Image Optimization36 images, 760 KB total, 260 KB wastedINFO
Image Optimization
36 images, 760 KB total, 260 KB wasted
Image Optimization Audit
Total Images
36
Total Size
760 KB
Oversized
2
Wasted
260 KB
12 missing dimensions 5 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.