v3.26.1
Cover - shares
3 Months Ended
Mar. 31, 2026
May 01, 2026
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Mar. 31, 2026  
Document Transition Report false  
Entity File Number 001-42144  
Registrant Name WEBTOON Entertainment Inc.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 81-3830533  
Entity Address, Address Line One 5700 Wilshire Blvd  
Entity Address, Address Line Two Suite 220  
Entity Address, City or Town Los Angeles  
Entity Address, State or Province CA  
Entity Address, Postal Zip Code 90036  
City Area Code 323  
Local Phone Number 424-3795  
Title of 12(b) Security Common stock, par value $0.0001 per share  
Trading Symbol WBTN  
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 false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   135,234,730
Document Fiscal Year Focus 2026  
Document Fiscal Period Focus Q1  
Entity Central Index Key 0001997859  
Amendment Flag false  
Current Fiscal Year End Date --12-31