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https://douyin.com

Sustainability

· 6 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.
SCORE
47
GRADE
F
FIX
4
REVIEW
1
PASS
1
INFO
0
Device:
Mobile Desktop
Checks
6
1 PASS 1 REVIEW 4 FIX
F
CO2 Per Page Load
Action
2.11g CO2 per view
FIX
2.11g CO2 per view
Critical::
2.11g CO2 per page view
This page transfers 7.5 MB, producing an estimated 2.11g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.39g, network 0.36g, end-user device 1.36g.
Got: 2.11g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 253.3 kg CO2/year
With 10,000 page views per month, this page would generate approximately 253.3 kg of CO2 annually — equivalent to charging 31662 smartphones.

2.11g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 5% of websites

Sustainable Web Design model v4 · Page size: 7.5 MB

Your site
2.11g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.39g
Network
0.36g
End-user device
1.36g
At 10,000 monthly views: Monthly: 21.1 kg · Annual: 253.3 kg · ≈ 31662 smartphone charges
D
Green Hosting
Action
Unknown
FIX
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

F
Carbon Budget
Action
95th percentile
FIX
95th percentile
Warning::
2.11g 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

2.11g

95th percentile

Cleaner than 5% of websites

✗ Above the median website

vs Median 252% more
vs Target 322% more
D
Transfer Efficiency
Action
40% efficient
FIX
40% efficient
Critical::
Transfer efficiency: 40%
An estimated 4549 KB (60%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 4549 KB of unused JavaScript. This wasted data produces 1.26g of unnecessary CO2 per page view.
40% efficient

Total waste: 4549 KB (60% of page weight)

Unused JS 4549 KB

1.26g unnecessary CO2 per visit

Actual transfer 7632 KB
Theoretical minimum 3083 KB
Potential savings 4549 KB (1.26g CO2)

See Deep Analysis sections above for specific optimizations.

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

Green Hosting

No green hosting detected

A+
Repeat Visit Weight
98% cached
PASS
98% cached
Info::
98% reduction on repeat visits
Returning visitors download only 132 KB (vs 7632 KB first visit). 238 of 240 resources are served from browser cache, saving 2.07g CO2 per repeat visit.
Info::
Repeat visit: 0.04g CO2 (first visit: 2.11g)
First visit
7632 KB
Repeat visit
132 KB

98% reduction on repeat visits

Saving 2.07g CO2 per returning visitor

238 resources served from cache · 2 resources re-downloaded

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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