| Document And Entity Information | Nov. 07, 2024 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Nov. 07, 2024 |
| Entity Registrant Name | WEBTOON Entertainment Inc. |
| Entity Central Index Key | 0001997859 |
| Entity Emerging Growth Company | false |
| Entity File Number | 001-42144 |
| 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 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common stock, par value $0.0001 per share |
| Trading Symbol | WBTN |
| Security Exchange Name | NASDAQ |
