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https://docusaurus.io

Sustainability

· 6 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.
SCORE
96
GRADE
A
FIX
0
REVIEW
0
PASS
6
INFO
0
Device:
Mobile Desktop
Checks
6
6 PASS
A
CO2 Per Page Load
0.27g CO2 per view
PASS
0.27g CO2 per view
Info::
0.27g CO2 per page view
This page transfers 1.2 MB, producing an estimated 0.27g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.01g, network 0.06g, end-user device 0.21g.
Got: 0.27g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 32.8 kg CO2/year
With 10,000 page views per month, this page would generate approximately 32.8 kg of CO2 annually — equivalent to charging 4097 smartphones.
Info::
Green hosting reduces data center emissions

0.27g

Carbon Footprint per page view

✓ Below sustainability target (0.50g)

Cleaner than 83% of websites

Sustainable Web Design model v4 · Page size: 1.2 MB

Your site
0.27g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.01g
Network
0.06g
End-user device
0.21g
At 10,000 monthly views: Monthly: 2.7 kg · Annual: 32.8 kg · ≈ 4097 smartphone charges
A+
Green Hosting
Green (both)
PASS
Green (both)
Info::
Both hosting and CDN use renewable energy
Got: Hosting: Cloudflare, CDN: Cloudflare
Info::
Cloudflare: 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 Cloudflare✓CDN Cloudflare✓

Cloudflare: 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 Weight
99% cached
PASS
99% cached
Info::
99% reduction on repeat visits
Returning visitors download only 14 KB (vs 1181 KB first visit). 90 of 92 resources are served from browser cache, saving 0.27g CO2 per repeat visit.
Info::
Repeat visit: 0.00g CO2 (first visit: 0.27g)
First visit
1181 KB
Repeat visit
14 KB

99% reduction on repeat visits

Saving 0.27g CO2 per returning visitor

90 resources served from cache · 2 resources re-downloaded

A
Carbon Budget
17th percentile
PASS
17th percentile
Info::
0.27g CO2 — below the sustainability target of 0.50g
Cleaner than an estimated 83% of websites analyzed. This page meets the Web Sustainability Guidelines target.
Info::
Estimated 17th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website

0.27g

17th percentile

Cleaner than 83% of websites

✓ Below the Web Sustainability Guidelines target

vs Median 54% cleaner ✓
vs Target 45% cleaner ✓
A+
Transfer Efficiency
90% efficient
PASS
90% efficient
Info::
Transfer efficiency: 90%
Only 112 KB of potential savings identified. Your page is well-optimized for size.
90% efficient

Total waste: 112 KB (10% of page weight)

Unused JS 112 KB

0.03g unnecessary CO2 per visit

Actual transfer 1181 KB
Theoretical minimum 1068 KB
Potential savings 112 KB (0.03g CO2)

See Deep Analysis sections above for specific optimizations.

A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Cloudflare

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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