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Cover Page
 12 Months Ended
Dec. 31, 2025
shares
Document Information [Line Items]  
Document Type 20-F
Amendment Flag false
Document Registration Statement false
Document Annual Report true
Current Fiscal Year End Date --12-31
Document Fiscal Year Focus 2025
Document Period End Date Dec. 31, 2025
Document Transition Report false
Document Shell Company Report false
Entity File Number 001-39087
Entity Registrant Name Youdao, Inc.
Entity Incorporation, State or Country Code E9
Entity Address, Address Line One No. 399, Wangshang Road
Entity Address, Address Line Two Binjiang District
Entity Address, City or Town Hangzhou
Entity Address, Postal Zip Code 310051
Entity Address, Country CN
Entity Well-known Seasoned Issuer No
Entity Voluntary Filers No
Entity Current Reporting Status Yes
Entity Interactive Data Current Yes
Entity Filer Category Accelerated Filer
Entity Emerging Growth Company false
ICFR Auditor Attestation Flag true
Document Financial Statement Error Correction [Flag] false
Document Accounting Standard U.S. GAAP
Entity Shell Company false
Auditor Firm ID 1424
Auditor Name PricewaterhouseCoopers Zhong Tian LLP
Auditor Location Beijing, the People’s Republic of China
Document Fiscal Period Focus FY
Entity Central Index Key 0001781753
Business Contact [Member]  
Document Information [Line Items]  
Entity Address, Address Line One No. 399, Wangshang Road, Binjiang District
Entity Address, City or Town Hangzhou
Entity Address, Postal Zip Code 310051
Entity Address, Country CN
Country Region 86
Contact Personnel Name Feng Zhou
City Area Code 0571
Local Phone Number 8985-2163
Contact Personnel Email Address zf@rd.netease.com
American depositary shares [Member]  
Document Information [Line Items]  
Title of 12(b) Security American depositary shares, each ADS represents one Class A ordinary share, par value US$0.0001 per share
Trading Symbol DAO
Security Exchange Name NYSE
Ordinary shares [Member]  
Document Information [Line Items]  
Entity Common Stock, Shares Outstanding 120,459,757
Class A ordinary share [Member]  
Document Information [Line Items]  
Title of 12(b) Security Class A ordinary shares, par value US$0.0001 per share*
Security Exchange Name NYSE
No Trading Symbol Flag true
Entity Common Stock, Shares Outstanding 32,471,397
Class B ordinary share [Member]  
Document Information [Line Items]  
Entity Common Stock, Shares Outstanding 87,988,360