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Document and Entity Information - shares
 9 Months Ended
Sep. 30, 2025
Oct. 30, 2025
Cover [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Quarterly Report true  
Document Transition Report false  
Document Period End Date Sep. 30, 2025  
Document Fiscal Year Focus 2025  
Document Fiscal Period Focus Q3  
Entity Registrant Name INVIVYD, INC.  
Entity Central Index Key 0001832038  
Current Fiscal Year End Date --12-31  
Entity File Number 001-40703  
Entity Tax Identification Number 85-1403134  
Entity Incorporation, State or Country Code DE  
Entity Address, Address Line One 209 Church Street  
Entity Address, City or Town New Haven  
Entity Address, State or Province CT  
Entity Address, Postal Zip Code 06510  
City Area Code 781  
Local Phone Number 819-0080  
Title of 12(b) Security Common Stock, $0.0001 par value per share  
Trading Symbol IVVD  
Security Exchange Name NASDAQ  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   233,122,834