v3.26.1
Loss per share - Schedule of Basic and Diluted Loss Per Share (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Basic earnings (loss) per share:    
Net income (loss) attributable to WEBTOON Entertainment Inc. $ (9,455) $ (22,389)
Add: allocation to subsidiary / equity method investee participating security (107) (87)
Net income (loss) attributable to WEBTOON Entertainment Inc. $ (9,562) $ (22,476)
Shares used in computation:    
Weighted-average common shares outstanding (shares) 133,618,587 129,598,942
Basic earnings (loss) per share (in usd per share) $ (0.07) $ (0.17)
Diluted earnings (loss) per share:    
Net income (loss) attributable to WEBTOON Entertainment Inc. $ (9,562) $ (22,476)
Add: dilutive impact of subsidiary / equity method investee stock options 0 (3)
Diluted net income (loss) attributable to WEBTOON Entertainment Inc. $ (9,562) $ (22,479)
Shares used in computation:    
Weighted-average common shares outstanding (shares) 133,618,587 129,598,942
Diluted weighted-average common shares outstanding (shares) 133,618,587 129,598,942
Diluted earnings (loss) per share (in usd per share) $ (0.07) $ (0.17)
Stock options and unvested RSUs    
Shares used in computation:    
Dilutive effect of stock options and unvested RSUs and PSUs (shares) 0 0
Unvested PSUs    
Shares used in computation:    
Dilutive effect of stock options and unvested RSUs and PSUs (shares) 0 0