https://tainexus.com
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
90
GRADE
A
FIX
0
REVIEW
2
PASS
5
INFO
1
Checks
85 PASS 2 REVIEW
BWeb Font Weight VariantsNo detectable Google Fonts weightsREVIEW
Web Font Weight Variants
No detectable Google Fonts weights
No detectable Google Fonts weights
Info::
No detectable Google Fonts weights
The analyzer detects font weights via Google Fonts URL parameters (~70% of font-using sites). Self-hosted fonts and non-Google CDN fonts aren't visible to URL-based detection. If you self-host fonts, manually audit how many @font-face weights you ship -- 2-3 weights per family is typically enough; 5+ is usually unused payload.
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
ACO2 Per Page Load0.26g CO2 per viewPASS
CO2 Per Page Load
0.26g CO2 per view
0.26g CO2 per view
Info::
0.26g CO2 per page view
This page transfers 1.1 MB, producing an estimated 0.26g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.01g, network 0.05g, end-user device 0.20g.
Got: 0.26g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 31.4 kg CO2/year
With 10,000 page views per month, this page would generate approximately 31.4 kg of CO2 annually — equivalent to charging 3928 smartphones.
Info::
Green hosting reduces data center emissions
0.26g
Carbon Footprint per page view
✓ Below sustainability target (0.50g)
Cleaner than 84% of websites
Sustainable Web Design model v4 · Page size: 1.1 MB
Your site
0.26g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.01g
Network
0.05g
End-user device
0.20g
At 10,000 monthly views: Monthly: 2.6 kg · Annual: 31.4 kg · ≈ 3928 smartphone charges
AGreen HostingGreen (cdn)PASS
Green Hosting
Green (cdn)
Green (cdn)
Info::
Cloudflare CDN uses renewable energy
Since most traffic is served through the CDN, the majority of data transfer energy is renewable.
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 Not identified✗CDN Cloudflare✓
Cloudflare: 100% renewable energy for global network since 2019
Based on known provider commitments. Verify at thegreenwebfoundation.org
A+Repeat Visit Weight91% cachedPASS
Repeat Visit Weight
91% cached
91% cached
Info::
91% reduction on repeat visits
Returning visitors download only 106 KB (vs 1133 KB first visit). 89 of 92 resources are served from browser cache, saving 0.24g CO2 per repeat visit.
Info::
Repeat visit: 0.02g CO2 (first visit: 0.26g)
First visit
1133 KB
Repeat visit
106 KB
91% reduction on repeat visits
Saving 0.24g CO2 per returning visitor
89 resources served from cache · 3 resources re-downloaded
ACarbon Budget16th percentilePASS
Carbon Budget
16th percentile
16th percentile
Info::
0.26g CO2 — below the sustainability target of 0.50g
Cleaner than an estimated 84% of websites analyzed. This page meets the Web Sustainability Guidelines target.
Info::
Estimated 16th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
0.26g
16th percentile
Cleaner than 84% of websites
✓ Below the Web Sustainability Guidelines target
vs Median 56% cleaner ✓
vs Target 48% cleaner ✓
A+Transfer Efficiency94% efficientPASS
Transfer Efficiency
94% efficient
94% efficient
Info::
Transfer efficiency: 94%
Only 62 KB of potential savings identified. Your page is well-optimized for size.
Total waste: 62 KB (6% of page weight)
Unused JS 62 KB
0.01g unnecessary CO2 per visit
Actual transfer 1133 KB
Theoretical minimum 1070 KB
Potential savings 62 KB (0.01g CO2)
See Deep Analysis sections above for specific optimizations.
Image Optimization20 images, 66 KB total, 19 KB wastedINFO
Image Optimization
20 images, 66 KB total, 19 KB wasted
Image Optimization Audit
Total Images
20
Total Size
66 KB
Oversized
1
Wasted
19 KB
2 missing dimensions 1 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.