v3.26.1
Cover - shares
 3 Months Ended
Mar. 31, 2026
May 01, 2026
Document Information [Line Items]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Mar. 31, 2026  
Document Transition Report false  
Entity File Number 001-40994  
Entity Registrant Name NerdWallet, Inc.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 45-4180440  
Entity Address, Address Line One 19 S. B Street  
Entity Address, Address Line Two Suite 9  
Entity Address, City or Town San Mateo  
Entity Address, State or Province CA  
Entity Address, Postal Zip Code 94401  
City Area Code 415  
Local Phone Number 549-8913  
Title of 12(b) Security Class A common stock, $0.0001 par value  
Trading Symbol NRDS  
Security Exchange Name NASDAQ  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Entity Shell Company false  
Amendment Flag false  
Entity Central Index Key 0001625278  
Document Fiscal Period Focus Q1  
Document Fiscal Year Focus 2026  
Current Fiscal Year End Date --12-31  
Common Class A    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   34,113,131
Common Class B    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   31,685,652