https://techguys.nz
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
78
GRADE
C
FIX
1
REVIEW
3
PASS
3
INFO
1
Checks
83 PASS 3 REVIEW 1 FIX
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
CTransfer EfficiencyAction71% efficientREVIEW
Transfer Efficiency
Action71% efficient
71% efficient
Warning::
Transfer efficiency: 71%
An estimated 412 KB (29%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 412 KB of unused JavaScript. This wasted data produces 0.11g of unnecessary CO2 per page view.
Total waste: 412 KB (29% of page weight)
Unused JS 412 KB
0.11g unnecessary CO2 per visit
Actual transfer 1429 KB
Theoretical minimum 1017 KB
Potential savings 412 KB (0.11g 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
ACO2 Per Page Load0.40g CO2 per viewPASS
CO2 Per Page Load
0.40g CO2 per view
0.40g CO2 per view
Info::
0.40g CO2 per page view
This page transfers 1.4 MB, producing an estimated 0.40g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.07g, network 0.07g, end-user device 0.25g.
Got: 0.40g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 47.4 kg CO2/year
With 10,000 page views per month, this page would generate approximately 47.4 kg of CO2 annually — equivalent to charging 5929 smartphones.
0.40g
Carbon Footprint per page view
✓ Below sustainability target (0.50g)
Cleaner than 71% of websites
Sustainable Web Design model v4 · Page size: 1.4 MB
Your site
0.40g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.07g
Network
0.07g
End-user device
0.25g
At 10,000 monthly views: Monthly: 4.0 kg · Annual: 47.4 kg · ≈ 5929 smartphone charges
A+Repeat Visit Weight99% cachedPASS
Repeat Visit Weight
99% cached
99% cached
Info::
99% reduction on repeat visits
Returning visitors download only 7 KB (vs 1429 KB first visit). 26 of 27 resources are served from browser cache, saving 0.39g CO2 per repeat visit.
Info::
Repeat visit: 0.00g CO2 (first visit: 0.40g)
First visit
1429 KB
Repeat visit
7 KB
99% reduction on repeat visits
Saving 0.39g CO2 per returning visitor
26 resources served from cache · 1 resources re-downloaded
ACarbon Budget29th percentilePASS
Carbon Budget
29th percentile
29th percentile
Info::
0.40g CO2 — below the sustainability target of 0.50g
Cleaner than an estimated 71% of websites analyzed. This page meets the Web Sustainability Guidelines target.
Info::
Estimated 29th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
0.40g
29th percentile
Cleaner than 71% of websites
✓ Below the Web Sustainability Guidelines target
vs Median 34% cleaner ✓
vs Target 21% cleaner ✓
Image Optimization12 images, 274 KB total, 178 KB wastedINFO
Image Optimization
12 images, 274 KB total, 178 KB wasted
Image Optimization Audit
Total Images
12
Total Size
274 KB
Oversized
4
Wasted
178 KB
10 missing alt text 10 missing dimensions
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.