Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2024	Aug. 02, 2024
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2024
Document Transition Report	false
Entity File Number	001-42144
Entity Registrant Name	WEBTOON Entertainment Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	81-3830533
Amendment Flag	false
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q2
Current Fiscal Year End Date	--12-31
Entity Central Index Key	0001997859
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	No
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		128,272,591