https://azratings.com
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
0
REVIEW
3
PASS
4
INFO
1
Checks
84 PASS 3 REVIEW
BCarbon Budget31th percentileREVIEW
Carbon Budget
31th percentile
31th percentile
Info::
0.41g CO2 — below the sustainability target of 0.50g
Cleaner than an estimated 69% of websites analyzed. This page meets the Web Sustainability Guidelines target.
Info::
Estimated 31th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
0.41g
31st percentile
Cleaner than 69% of websites
✓ Below the Web Sustainability Guidelines target
vs Median 31% cleaner ✓
vs Target 18% cleaner ✓
CTransfer EfficiencyAction68% efficientREVIEW
Transfer Efficiency
Action68% efficient
68% efficient
Warning::
Transfer efficiency: 68%
An estimated 576 KB (32%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 576 KB of unused JavaScript. This wasted data produces 0.13g of unnecessary CO2 per page view.
Total waste: 576 KB (32% of page weight)
Unused JS 576 KB
0.13g unnecessary CO2 per visit
Actual transfer 1781 KB
Theoretical minimum 1205 KB
Potential savings 576 KB (0.13g CO2)
See Deep Analysis sections above for specific optimizations.
CWeb Font Weight VariantsAction12 font weights loaded across 3 famil(y/ies)REVIEW
Web Font Weight Variants
Action12 font weights loaded across 3 famil(y/ies)
12 font weights loaded across 3 famil(y/ies)
Warning::
12 font weights loaded -- likely 100+ KB of unused payload
Loading 12 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: Google%20Sans%3A400, Google%20Sans%3A700, Open Sans.
ACO2 Per Page Load0.41g CO2 per viewPASS
CO2 Per Page Load
0.41g CO2 per view
0.41g CO2 per view
Info::
0.41g CO2 per page view
This page transfers 1.7 MB, producing an estimated 0.41g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.01g, network 0.09g, end-user device 0.32g.
Got: 0.41g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 49.4 kg CO2/year
With 10,000 page views per month, this page would generate approximately 49.4 kg of CO2 annually — equivalent to charging 6178 smartphones.
Info::
Green hosting reduces data center emissions
0.41g
Carbon Footprint per page view
✓ Below sustainability target (0.50g)
Cleaner than 69% of websites
Sustainable Web Design model v4 · Page size: 1.7 MB
Your site
0.41g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.01g
Network
0.09g
End-user device
0.32g
At 10,000 monthly views: Monthly: 4.1 kg · Annual: 49.4 kg · ≈ 6178 smartphone charges
A+Green HostingGreen (both)PASS
Green Hosting
Green (both)
Green (both)
Info::
Both hosting and CDN use renewable energy
Got: Hosting: Cloudflare, CDN: Cloudflare
Info::
Cloudflare: Verified by the Green Web Foundation
Info::
Cloudflare: 100% renewable energy for global network since 2019
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 Cloudflare✓CDN Cloudflare✓
Cloudflare: Verified by the Green Web Foundation
Cloudflare: 100% renewable energy for global network since 2019
Based on known provider commitments. Verify at thegreenwebfoundation.org
A+Repeat Visit Weight85% cachedPASS
Repeat Visit Weight
85% cached
85% cached
Info::
85% reduction on repeat visits
Returning visitors download only 263 KB (vs 1781 KB first visit). 89 of 102 resources are served from browser cache, saving 0.35g CO2 per repeat visit.
Info::
Repeat visit: 0.06g CO2 (first visit: 0.41g)
First visit
1781 KB
Repeat visit
263 KB
85% reduction on repeat visits
Saving 0.35g CO2 per returning visitor
89 resources served from cache · 13 resources re-downloaded
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: Cloudflare
Image Optimization1 images, 2 KB total, 0 KB wastedINFO
Image Optimization
1 images, 2 KB total, 0 KB wasted
Image Optimization Audit
Total Images
1
Total Size
2 KB
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.