https://fortza.net
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
70
GRADE
C
FIX
1
REVIEW
5
PASS
1
INFO
1
Checks
81 PASS 5 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
BCO2 Per Page Load0.58g CO2 per viewREVIEW
CO2 Per Page Load
0.58g CO2 per view
0.58g CO2 per view
Info::
0.58g CO2 per page view
This page transfers 2.0 MB, producing an estimated 0.58g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.11g, network 0.10g, end-user device 0.37g.
Got: 0.58g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 69.4 kg CO2/year
With 10,000 page views per month, this page would generate approximately 69.4 kg of CO2 annually — equivalent to charging 8677 smartphones.
0.58g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 53% of websites
Sustainable Web Design model v4 · Page size: 2.0 MB
Your site
0.58g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.11g
Network
0.10g
End-user device
0.37g
At 10,000 monthly views: Monthly: 5.8 kg · Annual: 69.4 kg · ≈ 8677 smartphone charges
BCarbon Budget47th percentileREVIEW
Carbon Budget
47th percentile
47th percentile
Info::
0.58g CO2 — below the median website (0.60g)
Better than an estimated 53% of websites, but above the sustainability target of 0.50g. Reducing page weight would help reach the target.
Info::
Estimated 47th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
0.58g
47th percentile
Cleaner than 53% of websites
✗ Above the median website
vs Median 4% cleaner ✓
vs Target 16% more
CTransfer EfficiencyAction73% efficientREVIEW
Transfer Efficiency
Action73% efficient
73% efficient
Warning::
Transfer efficiency: 73%
An estimated 557 KB (27%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 557 KB of unused JavaScript. This wasted data produces 0.15g of unnecessary CO2 per page view.
Total waste: 557 KB (27% of page weight)
Unused JS 557 KB
0.15g unnecessary CO2 per visit
Actual transfer 2091 KB
Theoretical minimum 1533 KB
Potential savings 557 KB (0.15g CO2)
See Deep Analysis sections above for specific optimizations.
CWeb Font Weight VariantsAction19 font weights loaded across 2 famil(y/ies)REVIEW
Web Font Weight Variants
Action19 font weights loaded across 2 famil(y/ies)
19 font weights loaded across 2 famil(y/ies)
Warning::
19 font weights loaded -- likely 100+ KB of unused payload
Loading 19 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: Open Sans, Ubuntu%3A100italic%2C200italic%2C300italic%2C400italic%2C500italic%2C600italic%2C700italic%2C800italic%2C900italic%2C100%2C200%2C300%2C400%2C500%2C600%2C700%2C800%2C900.
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 33 KB (vs 2091 KB first visit). 57 of 58 resources are served from browser cache, saving 0.57g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 0.58g)
First visit
2091 KB
Repeat visit
33 KB
98% reduction on repeat visits
Saving 0.57g CO2 per returning visitor
57 resources served from cache · 1 resources re-downloaded
Image Optimization16 images, 201 KB total, 134 KB wastedINFO
Image Optimization
16 images, 201 KB total, 134 KB wasted
Image Optimization Audit
Total Images
16
Total Size
201 KB
Oversized
4
Wasted
134 KB
6 missing dimensions 8 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.