https://zira.uz
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
80
GRADE
B
FIX
1
REVIEW
3
PASS
3
INFO
1
Checks
83 PASS 3 REVIEW 1 FIX
DCarbon BudgetAction52th percentileFIX
Carbon Budget
Action52th percentile
52th percentile
Warning::
0.70g CO2 — above the median website (0.60g)
Heavier than an estimated 48% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 52th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
0.70g
52nd percentile
Cleaner than 48% of websites
✗ Above the median website
vs Median 17% more
vs Target 40% more
BCO2 Per Page Load0.70g CO2 per viewREVIEW
CO2 Per Page Load
0.70g CO2 per view
0.70g CO2 per view
Info::
0.70g CO2 per page view
This page transfers 3.0 MB, producing an estimated 0.70g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.02g, network 0.15g, end-user device 0.54g.
Got: 0.70g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 84.2 kg CO2/year
With 10,000 page views per month, this page would generate approximately 84.2 kg of CO2 annually — equivalent to charging 10528 smartphones.
Info::
Green hosting reduces data center emissions
0.70g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 48% of websites
Sustainable Web Design model v4 · Page size: 3.0 MB
Your site
0.70g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.02g
Network
0.15g
End-user device
0.54g
At 10,000 monthly views: Monthly: 7.0 kg · Annual: 84.2 kg · ≈ 10528 smartphone charges
BGreen HostingGreen (hosting)REVIEW
Green Hosting
Green (hosting)
Green (hosting)
Info::
Hetzner Online GmbH uses renewable energy
Info::
Hetzner Online GmbH: 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 Hetzner Online GmbH✓CDN Not identified✗
Hetzner Online GmbH: Verified by the Green Web Foundation
Based on known provider commitments. Verify at thegreenwebfoundation.org
BTransfer Efficiency78% efficientREVIEW
Transfer Efficiency
78% efficient
78% efficient
Info::
Transfer efficiency: 78%
An estimated 679 KB (22%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 679 KB of unused JavaScript. This wasted data produces 0.16g of unnecessary CO2 per page view.
Total waste: 679 KB (22% of page weight)
Unused JS 679 KB
0.16g unnecessary CO2 per visit
Actual transfer 3036 KB
Theoretical minimum 2357 KB
Potential savings 679 KB (0.16g CO2)
See Deep Analysis sections above for specific optimizations.
A+Repeat Visit Weight99% cachedPASS
Repeat Visit Weight
99% cached
99% cached
Info::
99% reduction on repeat visits
Returning visitors download only 30 KB (vs 3036 KB first visit). 139 of 141 resources are served from browser cache, saving 0.69g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 0.70g)
First visit
3036 KB
Repeat visit
30 KB
99% reduction on repeat visits
Saving 0.69g CO2 per returning visitor
139 resources served from cache · 2 resources re-downloaded
A+Web Font Weight Variants1 font weights loaded across 1 famil(y/ies) -- reasonablePASS
Web Font Weight Variants
1 font weights loaded across 1 famil(y/ies) -- reasonable
1 font weights loaded across 1 famil(y/ies) -- reasonable
Info::
1 font weight(s) loaded across 1 famil(y/ies)
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
Whether the site is served from green-energy infrastructure
Green Hosting
This site is hosted on green energy infrastructure
Provider: Hetzner Online GmbH
Image Optimization21 images, 497 KB total, 0 KB wastedINFO
Image Optimization
21 images, 497 KB total, 0 KB wasted
Image Optimization Audit
Total Images
21
Total Size
497 KB
Oversized
1
12 missing dimensions 18 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.