https://jaga.id
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
49
GRADE
F
FIX
4
REVIEW
2
PASS
1
INFO
1
Checks
81 PASS 2 REVIEW 4 FIX
FCO2 Per Page LoadAction2.39g CO2 per viewFIX
CO2 Per Page Load
Action2.39g CO2 per view
2.39g CO2 per view
Critical::
2.39g CO2 per page view
This page transfers 8.4 MB, producing an estimated 2.39g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.44g, network 0.41g, end-user device 1.53g.
Got: 2.39g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 286.5 kg CO2/year
With 10,000 page views per month, this page would generate approximately 286.5 kg of CO2 annually — equivalent to charging 35817 smartphones.
2.39g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 5% of websites
Sustainable Web Design model v4 · Page size: 8.4 MB
Your site
2.39g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.44g
Network
0.41g
End-user device
1.53g
At 10,000 monthly views: Monthly: 23.9 kg · Annual: 286.5 kg · ≈ 35817 smartphone charges
DGreen HostingActionNot greenFIX
Green Hosting
ActionNot green
Not green
Info::
No confirmed renewable energy commitment detected
Consider providers like Cloudflare, Google Cloud, or Vercel that match 100% of their energy use with renewables.
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 HostingNot Green Hosted
Hosting Amazon Web Services✗CDN Not identified✗
Based on known provider commitments. Verify at thegreenwebfoundation.org
FCarbon BudgetAction95th percentileFIX
Carbon Budget
Action95th percentile
95th percentile
Warning::
2.39g 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
2.39g
95th percentile
Cleaner than 5% of websites
✗ Above the median website
vs Median 298% more
vs Target 378% more
FTransfer EfficiencyAction32% efficientFIX
Transfer Efficiency
Action32% efficient
32% efficient
Critical::
Transfer efficiency: 32%
An estimated 5846 KB (68%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 5846 KB of unused JavaScript. This wasted data produces 1.62g of unnecessary CO2 per page view.
Total waste: 5846 KB (68% of page weight)
Unused JS 5846 KB
1.62g unnecessary CO2 per visit
Actual transfer 8634 KB
Theoretical minimum 2787 KB
Potential savings 5846 KB (1.62g CO2)
See Deep Analysis sections above for specific optimizations.
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
A+Repeat Visit Weight100% cachedPASS
Repeat Visit Weight
100% cached
100% cached
Info::
100% reduction on repeat visits
Returning visitors download only 20 KB (vs 8634 KB first visit). 404 of 410 resources are served from browser cache, saving 2.38g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 2.39g)
First visit
8634 KB
Repeat visit
20 KB
100% reduction on repeat visits
Saving 2.38g CO2 per returning visitor
404 resources served from cache · 6 resources re-downloaded
Image Optimization38 images, 445 KB total, 248 KB wastedINFO
Image Optimization
38 images, 445 KB total, 248 KB wasted
Image Optimization Audit
Total Images
38
Total Size
445 KB
Oversized
14
Wasted
248 KB
18 missing alt text 37 missing dimensions 29 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.