https://web.whatsapp.com
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
4
REVIEW
2
PASS
1
INFO
1
Checks
81 PASS 2 REVIEW 4 FIX
FCO2 Per Page LoadAction1.72g CO2 per viewFIX
CO2 Per Page Load
Action1.72g CO2 per view
1.72g CO2 per view
Warning::
1.72g CO2 per page view
This page transfers 6.1 MB, producing an estimated 1.72g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.32g, network 0.30g, end-user device 1.10g.
Got: 1.72g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 206.0 kg CO2/year
With 10,000 page views per month, this page would generate approximately 206.0 kg of CO2 annually — equivalent to charging 25749 smartphones.
1.72g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 19% of websites
Sustainable Web Design model v4 · Page size: 6.1 MB
Your site
1.72g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.32g
Network
0.30g
End-user device
1.10g
At 10,000 monthly views: Monthly: 17.2 kg · Annual: 206.0 kg · ≈ 25749 smartphone charges
DGreen HostingActionUnknownFIX
Green Hosting
ActionUnknown
Unknown
Info::
Hosting provider could not be identified
Without knowing the provider, we cannot determine their energy sourcing. Check with your hosting provider about their renewable energy commitments.
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 HostingUnable to Determine
Hosting Not identified✗CDN Not identified✗
Based on known provider commitments. Verify at thegreenwebfoundation.org
FCarbon BudgetAction81th percentileFIX
Carbon Budget
Action81th percentile
81th percentile
Warning::
1.72g CO2 — above the median website (0.60g)
Heavier than an estimated 19% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 81th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
1.72g
81st percentile
Cleaner than 19% of websites
✗ Above the median website
vs Median 186% more
vs Target 243% more
FTransfer EfficiencyAction30% efficientFIX
Transfer Efficiency
Action30% efficient
30% efficient
Critical::
Transfer efficiency: 30%
An estimated 4373 KB (70%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 4373 KB of unused JavaScript. This wasted data produces 1.21g of unnecessary CO2 per page view.
Total waste: 4373 KB (70% of page weight)
Unused JS 4373 KB
1.21g unnecessary CO2 per visit
Actual transfer 6207 KB
Theoretical minimum 1833 KB
Potential savings 4373 KB (1.21g 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 Weight98% cachedPASS
Repeat Visit Weight
98% cached
98% cached
Info::
98% reduction on repeat visits
Returning visitors download only 95 KB (vs 6207 KB first visit). 42 of 43 resources are served from browser cache, saving 1.69g CO2 per repeat visit.
Info::
Repeat visit: 0.03g CO2 (first visit: 1.72g)
First visit
6207 KB
Repeat visit
95 KB
98% reduction on repeat visits
Saving 1.69g CO2 per returning visitor
42 resources served from cache · 1 resources re-downloaded
Image Optimization1 images, 5 KB total, 0 KB wastedINFO
Image Optimization
1 images, 5 KB total, 0 KB wasted
Image Optimization Audit
Total Images
1
Total Size
5 KB
1 missing alt text 1 missing dimensions
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.