https://tarotai.chat
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
72
GRADE
C
FIX
2
REVIEW
1
PASS
4
INFO
1
Checks
84 PASS 1 REVIEW 2 FIX
FCO2 Per Page LoadAction2.62g CO2 per viewFIX
CO2 Per Page Load
Action2.62g CO2 per view
2.62g CO2 per view
Critical::
2.62g CO2 per page view
This page transfers 11.1 MB, producing an estimated 2.62g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.07g, network 0.54g, end-user device 2.01g.
Got: 2.62g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 314.4 kg CO2/year
With 10,000 page views per month, this page would generate approximately 314.4 kg of CO2 annually — equivalent to charging 39298 smartphones.
Info::
Green hosting reduces data center emissions
2.62g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 5% of websites
Sustainable Web Design model v4 · Page size: 11.1 MB
Your site
2.62g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.07g
Network
0.54g
End-user device
2.01g
At 10,000 monthly views: Monthly: 26.2 kg · Annual: 314.4 kg · ≈ 39298 smartphone charges
FCarbon BudgetAction95th percentileFIX
Carbon Budget
Action95th percentile
95th percentile
Warning::
2.62g CO2 — above the median website (0.60g)
Heavier than an estimated 5% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 95th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
2.62g
95th percentile
Cleaner than 5% of websites
✗ Above the median website
vs Median 337% more
vs Target 424% more
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.
A+Green HostingGreen (both)PASS
Green Hosting
Green (both)
Green (both)
Info::
Both hosting and CDN use renewable energy
Got: Hosting: Next.js, CDN: Cloudflare
Info::
Next.js: 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 Next.js✓CDN Cloudflare✓
Next.js: 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 Weight100% cachedPASS
Repeat Visit Weight
100% cached
100% cached
Info::
100% reduction on repeat visits
Returning visitors download only 31 KB (vs 11334 KB first visit). 166 of 167 resources are served from browser cache, saving 2.61g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 2.62g)
First visit
11334 KB
Repeat visit
31 KB
100% reduction on repeat visits
Saving 2.61g CO2 per returning visitor
166 resources served from cache · 1 resources re-downloaded
A+Transfer Efficiency98% efficientPASS
Transfer Efficiency
98% efficient
98% efficient
Info::
Transfer efficiency: 98%
Only 259 KB of potential savings identified. Your page is well-optimized for size.
Total waste: 259 KB (2% of page weight)
Unused JS 259 KB
0.06g unnecessary CO2 per visit
Actual transfer 11334 KB
Theoretical minimum 11074 KB
Potential savings 259 KB (0.06g CO2)
See Deep Analysis sections above for specific optimizations.
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 Optimization30 images, 321 KB total, 288 KB wastedINFO
Image Optimization
30 images, 321 KB total, 288 KB wasted
Image Optimization Audit
Total Images
30
Total Size
321 KB
Oversized
3
Wasted
288 KB
3 missing dimensions
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.