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https://juvel.pages.dev

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
Device:
Mobile Desktop
Checks
8
5 PASS 2 REVIEW
C
Repeat Visit Weight
Action
50% cached
REVIEW
50% cached
Warning::
Only 50% reduction on repeat visits
Returning visitors still download 248 KB — only 50% less than the first visit (500 KB). 1 resources lack proper caching headers. See the Performance tab's HTTP Caching section for specific recommendations.
Info::
Repeat visit: 0.06g CO2 (first visit: 0.12g)
First visit
500 KB
Repeat visit
248 KB

50% reduction on repeat visits

Saving 0.06g CO2 per returning visitor

14 resources served from cache · 1 resources re-downloaded

C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
CO2 Per Page Load
0.12g CO2 per view
PASS
0.12g CO2 per view
Info::
0.12g CO2 per page view
This page transfers 0.5 MB, producing an estimated 0.12g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.00g, network 0.02g, end-user device 0.09g.
Got: 0.12g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 13.9 kg CO2/year
With 10,000 page views per month, this page would generate approximately 13.9 kg of CO2 annually — equivalent to charging 1733 smartphones.
Info::
Green hosting reduces data center emissions

0.12g

Carbon Footprint per page view

✓ Below sustainability target (0.50g)

Cleaner than 90% of websites

Sustainable Web Design model v4 · Page size: 0.5 MB

Your site
0.12g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.00g
Network
0.02g
End-user device
0.09g
At 10,000 monthly views: Monthly: 1.2 kg · Annual: 13.9 kg · ≈ 1733 smartphone charges
A
Green Hosting
Green (cdn)
PASS
Green (cdn)
Info::
Cloudflare Pages CDN uses renewable energy
Since most traffic is served through the CDN, the majority of data transfer energy is renewable.
Info::
Cloudflare Pages: Runs on Cloudflare's 100% renewable network
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 Pages✓

Cloudflare Pages: Runs on Cloudflare's 100% renewable network

Based on known provider commitments. Verify at thegreenwebfoundation.org

A+
Carbon Budget
10th percentile
PASS
10th percentile
Info::
0.12g CO2 — below the sustainability target of 0.50g
Cleaner than an estimated 90% of websites analyzed. This page meets the Web Sustainability Guidelines target.
Info::
Estimated 10th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website

0.12g

10th percentile

Cleaner than 90% of websites

✓ Below the Web Sustainability Guidelines target

vs Median 81% cleaner ✓
vs Target 77% cleaner ✓
A+
Transfer Efficiency
100% efficient
PASS
100% efficient
Info::
Transfer efficiency: 100%
Only 0 KB of potential savings identified. Your page is well-optimized for size.
100% efficient
Actual transfer 500 KB
Theoretical minimum 500 KB

See Deep Analysis sections above for specific optimizations.

A+
Web Font Weight Variants
4 font weights loaded across 2 famil(y/ies) -- reasonable
PASS
4 font weights loaded across 2 famil(y/ies) -- reasonable
Info::
4 font weight(s) loaded across 2 famil(y/ies)
Image Optimization
3 images, 263 KB total, 145 KB wasted
INFO

Image Optimization Audit

Total Images

3

Total Size

263 KB

Oversized

2

Wasted

145 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.

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