Statistical Measurement [Domain] Statistical Measurement [Domain] Other Current Assets Other Current Assets [Member] Award Timing Predetermined Award Timing Predetermined [Flag] Related Party Transaction [Axis] Related Party Transaction [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Asset Class [Axis] Asset Class [Axis] Entity File Number Entity File Number Additional paid-in capital Additional Paid-in Capital [Member] Valuation Approach and Technique [Domain] Valuation Approach and Technique [Domain] Gain (loss) on equity method investments, net Loss on equity method investments, net Loss(income) on equity method investment, net Share of net income (loss) Income (Loss) from Equity Method Investments Tabular List, Table Tabular List [Table Text Block] Leases [Abstract] Leases [Abstract] Basic earnings (loss) per share: Earnings Per Share, Basic [Abstract] Increase in right-of-use assets recognized from new lease agreements Noncash Transaction, Increase In Right-Of-Use Assets Recognized From New Agreements Noncash Transaction, Increase In Right-Of-Use Assets Recognized From New Agreements Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Payment made for short-term investments Payments to Acquire Short-Term Investments Schedule of Significant Related Party Transactions Schedule of Related Party Transactions [Table Text Block] Changes in accounts payable Increase (Decrease) in Accounts Payable Advance payments due to film production contracts, current Contract with Customer, Asset, after Allowance for Credit Loss, Current Pledged Status [Axis] Pledged Status [Axis] Debt Securities Debt Securities [Member] Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Basic (in usd per share) Basic earnings (loss) per share (in usd per share) Earnings Per Share, Basic Adjustment to Compensation: Adjustment to Compensation [Axis] Related Party Transactions Related Party Transactions Disclosure [Text Block] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Other current assets, net Other Assets, Miscellaneous, Current Revenue Revenue from Contract with Customer [Text Block] Stock, Class of Stock [Table] Stock, Class of Stock [Table] Discount rate Measurement Input, Discount Rate [Member] Total other comprehensive income (loss), net of tax Other Comprehensive Income (Loss), Net of Tax Revenue remaining performance obligation Revenue, Remaining Performance Obligation, Amount Measurement Input Type [Domain] Measurement Input Type [Domain] Other non-current assets, net Other Assets, Miscellaneous, Noncurrent Adjustment to Compensation, Amount Adjustment to Compensation Amount Concentration risk (as a percent) Concentration Risk, Percentage Changes in other assets Increase (Decrease) in Other Operating Assets Stock-based compensation Share-Based Payment Arrangement, Noncash Expense Stock options Share-Based Payment Arrangement, Option [Member] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Debt and equity securities realized gain or loss Debt and Equity Securities, Realized Gain (Loss) Merchandise Sales Merchandise Sales [Member] Merchandise sales. Debt and equity securities Debt Securities, Trading, and Equity Securities, FV-NI Antidilutive Securities [Axis] Antidilutive Securities [Axis] Total stockholders' equity attributable to WEBTOON Entertainment Inc. 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Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Pay vs Performance Disclosure [Line Items] Lease obligation Operating Lease, Liability Line Digital Frontier - Lease One Lease Contractual Term, Line Digital Frontier, Lease One [Member] Lease Contractual Term, Line Digital Frontier, Lease One Retirement Benefits [Abstract] Retirement Benefits [Abstract] Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Reportable Segment Reportable Segment [Member] Reportable Segment Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction The Walt Disney Company (“Disney”) Subsidiary The Walt Disney Company (“Disney”) Subsidiary [Member] The Walt Disney Company (“Disney”) Subsidiary Income (loss) before income tax Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Entity Shell Company Entity Shell Company IP Adaptations I P Adaptations [Member] IP adaptations. Other non-current liabilities Other Liabilities, Noncurrent Proceeds from sale of property and equipment Proceeds from Sale of Property, Plant, and Equipment Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Company Selected Measure Amount Company Selected Measure Amount Total comprehensive income (loss) attributable to non-controlling interests and redeemable non-controlling interests Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Total comprehensive income (loss) attributable to WEBTOON Entertainment Inc. 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Entity Address, City or Town Entity Address, City or Town Operating activities: Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Schedule of Significant Balances Due From and Due To Related Parties Schedule Of Related Party Balances [Table Text Block] Schedule of related party balances. Effect of exchange rate changes on cash and cash equivalents Effect of Exchange Rate on Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Concentration Risk Type [Axis] Concentration Risk Type [Axis] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Statement of Income Location, Balance [Domain] Statement of Income Location, Balance [Domain] Restricted Stock Units Restricted Stock Units (RSUs) [Member] Private equity securities Private Equity Funds [Member] Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Contribution to investment fund Contribution Investment Fund [Member] Contribution to investment fund. Entity Emerging Growth Company Entity Emerging Growth Company Marketing Marketing Marketing Expense Purchases of intangible assets Payments to Acquire Intangible Assets Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Monthly lease payment Lessee, Operating Lease, Periodic Payment Lessee, Operating Lease, Periodic Payment Right-of-use assets obtained in exchange for operating lease liabilities Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Equity method investments Beginning balance Ending balance Equity Method Investments Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Related Parties Related Party [Member] Common stock outstanding (in shares) Beginning balance (in shares) Ending balance (in shares) Common Stock, Shares, Outstanding Assets Pledged as Collateral Asset Pledged as Collateral [Member] Schedule of Supplemental Cash Flow Information Related to Operating Leases Schedule of Supplemental Cash Flow Information Related to Operating Leases [Table Text Block] Schedule of supplemental cash flow information related to operating leases. Allowance for credit losses Accounts Receivable, Credit Loss Expense (Reversal) PEO PEO [Member] Lease Contractual Term [Domain] Lease Contractual Term [Domain] Schedule of Revenue Disaggregation Disaggregation of Revenue [Table Text Block] Changes in operating assets and liabilities Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Accumulated deficit Retained Earnings [Member] Prepaid expenses and other current assets, net Total other current assets, net Prepaid Expense and Other Assets, Current Number of Units [Roll Forward] Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Pledged Status [Domain] Pledged Status [Domain] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Restatement Determination Date Restatement Determination Date Share-Based Payment Arrangement [Abstract] Share-Based Payment Arrangement [Abstract] Cash and cash equivalents at beginning of the year Cash and cash equivalents at end of the year Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Income Statement [Abstract] Income Statement [Abstract] Income tax expense Income tax expense Income tax expense (benefit) Income Tax Expense (Benefit) Payment made for loan receivable Payments to Acquire Loans Receivable Taxes payable Taxes Payable, Current Beginning balance Ending balance Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Statement of Financial Position Location, Activity, Capitalization [Axis] Statement of Financial Position Location, Activity, Capitalization [Axis] Intangible assets, net Intangible Assets, Net (Excluding Goodwill) Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Product and Service [Domain] Product and Service [Domain] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Customer Concentration Risk Customer Concentration Risk [Member] Property and equipment Property, Plant and Equipment, Gross Total stockholders' equity attributable to WEBTOON Entertainment Inc. Parent [Member] Net income (loss) Net income (loss) Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Equity securities measurement input Equity Securities, FV-NI, Measurement Input Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Business Combination [Table] Business Combination [Table] Bootcamp 2 Bootcamp [Member] Bootcamp Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Proceeds from stock option exercise Proceeds from Stock Options Exercised Advance payments, net Advance Payments, Net, Noncurrent Advance Payments, Net, Noncurrent City Area Code City Area Code Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] All Trading Arrangements All Trading Arrangements [Member] Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Accrued expenses Accrued Liabilities, Current Beginning balance (shares) Ending balance (shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Redeemable Non-Controlling Interest in Subsidiary Redeemable Noncontrolling Interest [Text Block] Redeemable noncontrolling interest. Investing activities: Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] General and administrative expenses General and administrative expenses General and administrative expenses incurred General and Administrative Expense Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Net cash used in operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Loan receivables Financing Receivable, Excluding Accrued Interest, after Allowance for Credit Loss, Noncurrent Related Party Transactions [Abstract] Related Party Transactions [Abstract] Investments in and Advances to Affiliates, at Fair Value [Roll Forward] Investments in and Advances to Affiliates, at Fair Value [Roll Forward] Equity Method Investments and Joint Ventures [Abstract] Equity Method Investments and Joint Ventures [Abstract] Estimated Useful Lives Property, Plant and Equipment, Useful Life Revenues from External Customers and Long-Lived Assets [Line Items] Revenues from External Customers and Long-Lived Assets [Line Items] Equity Securities Equity Securities, FV-NI Cost of revenue Cost of Sales [Member] Goodwill, net Goodwill net, Beginning Balance Goodwill net, Ending Balance Goodwill Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] PEO Total Compensation Amount PEO Total Compensation Amount Lease Contractual Term [Axis] Lease Contractual Term [Axis] Shares used in computation: Weighted Average Number of Shares Outstanding, Basic [Abstract] Equity Components [Axis] Equity Components [Axis] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Defined severance benefits Liability, Defined Benefit Pension Plan, Noncurrent Total other income generated from subleases Income from Sublease Sublease Income Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Number of reportable segments Number of Reportable Segments Equipment Equipment [Member] Description of Business and Summary of Significant Accounting Policies Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block] Supplemental disclosure: Supplemental Cash Flow Information [Abstract] Three Borrowers Customer, Three Borrowers [Member] Three borrowers. General and administrative expenses - labor related General and Administrative Expense, Labor General and Administrative Expense, Labor Other Performance Measure, Amount Other Performance Measure, Amount Foreign currency translation adjustments, net of tax Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax Entity Address, State or Province Entity Address, State or Province Antidilutive Security, Excluded EPS Calculation [Table] Antidilutive Security, Excluded EPS Calculation [Table] Paid Content Paid Content [Member] Paid content. Related Party [Domain] Related and Nonrelated Parties [Domain] Total current liabilities Liabilities, Current Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] Individual: Individual [Axis] Defined severance expense Defined Contribution Plan, Cost Other current assets Other Assets, Current Net cash used in investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Revenue remaining performance obligation expected Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Document Fiscal Year Focus Document Fiscal Year Focus Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Net Income (Loss) Net Income (Loss), Including Portion Attributable To Noncontrolling Interest And Group Equity Profit loss including Group equity. Operating lease right-of-use assets Right-of-use asset Operating Lease, Right-of-Use Asset Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Effective income tax rate (as a percent) Effective Income Tax Rate Reconciliation, Percent Rest of World Rest Of The World [Member] Rest Of The World Entity Interactive Data Current Entity Interactive Data Current Operating lease expense Operating Lease, Cost Unrecognized stock-based compensation expense, period for recognition Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Equity [Abstract] Buildings Building [Member] Loss on debt and equity securities, net Debt and Equity Securities, Gain (Loss) Less: Segment Reconciliation [Abstract] Segment and Geographic Information Segment Reporting Disclosure [Text Block] Net discrete tax (benefit) expense Income Taxes, Discrete Tax Expense (Benefit), Net Income Taxes, Discrete Tax Expense (Benefit), Net Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Long-Lived Tangible Asset [Axis] Long-Lived Tangible Asset [Axis] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Schedule of Balances of Non-controlling Interest Minority Interest [Table Text Block] Minority Interest. Schedule of Periodic Benefit Costs (Income) Schedule of Net Benefit Costs [Table Text Block] Change in severance benefit, net Pension and Other Postretirement Benefits Expense (Reversal of Expense), Noncash Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Loans receivables Loans Receivable [Member] Goodwill and Impairment of Goodwill Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block] Volatility Measurement Input, Price Volatility [Member] Deferred tax assets Deferred Income Tax Assets, Net Debt securities measurement input Debt Securities, Available-for-Sale, Measurement Input Depreciation and amortization Depreciation, Depletion and Amortization Other non-current assets, net Total other non-current assets, net Other non-current assets Other Assets, Noncurrent Customer [Domain] Customer [Domain] Entity Central Index Key Entity Central Index Key PEO Name PEO Name Schedule of Revenues from External Customers and Long-Lived Assets [Table] Schedule of Revenues from External Customers and Long-Lived Assets [Table] Net proceeds Sale of Stock, Consideration Received on Transaction Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Option pricing model Valuation Technique, Option Pricing Model [Member] Advertising Advertising [Member] Arrangement Duration Trading Arrangement Duration Marketing expenses incurred (cost reimbursed) Marketing Expense Incurred (Reimbursed) Marketing Expense Incurred (Reimbursed) Contract liabilities Contract with Customer, Liability, Current Segments [Axis] Segments [Axis] Exercise Price Award Exercise Price Entity Filer Category Entity Filer Category Local Phone Number Local Phone Number Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Advance payments due to film production contracts Contract with Customer, Asset, after Allowance for Credit Loss, Noncurrent Other investing activities Payment for (Proceeds from) Other Investing Activity Stock-Based Compensation Share-Based Payment Arrangement [Text Block] Assets Assets [Abstract] Proceeds from maturities of short-term investments Proceeds from Maturities, Prepayments and Calls of Short-Term Investments Underlying Security Market Price Change Underlying Security Market Price Change, Percent Unvested RSUs Unvested Restricted Stock Unit's [Member] Unvested restricted stock unit's member. Forfeited (in usd per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Fair Value Measurements Fair Value Disclosures [Text Block] Retirement Benefits Retirement Benefits [Text Block] Business Combination [Line Items] Business Combination [Line Items] Stockholders' equity: Equity, Attributable to Parent [Abstract] Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Munpia 1 Munpia [Member] Munpia Shares eligible to be earned and vest (as a percent) Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage Entity Address, Address Line One Entity Address, Address Line One Entity Address, Address Line Two Entity Address, Address Line Two Accumulated other comprehensive loss AOCI Attributable to Parent [Member] Changes in accrued expenses Increase (Decrease) in Accrued Liabilities and Other Operating Liabilities Allowances for credit losses Accounts Receivable, Allowance for Credit Loss, Current Long-term operating lease liabilities Operating lease liabilities Operating Lease, Liability, Noncurrent Redeemable non-controlling interest in subsidiary Balance as of January 1, Balance as of March 31, Redeemable Noncontrolling Interest, Equity, Carrying Amount Equity-based compensation and others (in shares) APIC, Share-Based Payment Arrangement, Shares, Increase for Cost Recognition APIC, Share-Based Payment Arrangement, Shares, Increase for Cost Recognition Fair Value as of Grant Date Award Grant Date Fair Value Property, Plant and Equipment [Abstract] Registrant Name Entity Registrant Name Discount rate (as a percent) Lessee, Operating Lease, Discount Rate Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Net periodic benefit costs (income) Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Expected volatility (as a percent) Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Weighted Average Volatility Rate Dilutive effect of stock options and unvested RSUs and PSUs (shares) Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements Granted (shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Unrecognized stock-based compensation expense Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Forfeited (shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Related Party Transaction [Line Items] Related Party Transaction [Line Items] Document Quarterly Report Document Quarterly Report Leasing Office Space Office Space Lease [Member] Office space lease. Three Payment Gateways Companies Customer, Three Payment Gateways Companies [Member] Three payment gateways companies. Schedule of Ranges of Significant Unobservable Inputs Used to Value Level 3 Assets Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Counterparty Name [Domain] Counterparty Name [Domain] Number of operating segments Number of Operating Segments Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Interest expense Defined Benefit Plan, Interest Cost Granted (in usd per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Related and Nonrelated Parties [Axis] Related and Nonrelated Parties [Axis] Title Trading Arrangement, Individual Title Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Restatement Determination Date: Restatement Determination Date [Axis] Non-PEO NEO Non-PEO NEO [Member] Due from related parties Due From Related Parties [Abstract] Due from related parties. Land Land [Member] Name Trading Arrangement, Individual Name All Award Types Award Type [Domain] Goodwill, net Goodwill Disclosure [Text Block] Non-controlling interests in consolidated subsidiaries Equity, Attributable to Noncontrolling Interest Equity Awards Adjustments Equity Awards Adjustments [Member] Leasehold improvements Leasehold Improvements [Member] Other non-cash items Other Noncash Income (Expense) Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Compensation Amount Outstanding Recovery Compensation Amount Dividend rate (as a percent) Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Customer liability revenue recognized during the period Contract with Customer, Liability, Revenue Recognized Share Repurchase Program [Axis] Share Repurchase Program [Axis] MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Name Awards Close in Time to MNPI Disclosures, Individual Name Equity interest rate (as a percent) Equity Ownership, Excluding Consolidated Entity and Equity Method Investee, Percentage Beginning balance (in usd per share) Ending balance (in usd per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Prepaid Expenses and Other Assets, net Other Assets Disclosure [Text Block] Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Equity-based compensation and others APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Unvested PSUs Unvested Performance Stock Unit's [Member] Unvested Performance Stock Unit's Financial Instruments [Domain] Financial Instruments [Domain] Purchases Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases Segments [Domain] Segments [Domain] Statement of Income Location, Balance [Axis] Statement of Income Location, Balance [Axis] Performance Stock Units Performance Shares [Member] Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Statement of Financial Position Location, Activity, Capitalization [Domain] Statement of Financial Position Location, Activity, Capitalization [Domain] Minimum Minimum [Member] Add: dilutive impact of subsidiary / equity method investee stock options Participating Securities, Distributed and Undistributed Earnings (Loss), Diluted Less: Accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Company Selected Measure Name Company Selected Measure Name Provisions and defined pension benefits Provisions and Defined Pension Benefits Liability, Current Provisions and defined pension benefits. Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Accounts payable Accounts Payable, Current Cash paid for amounts included in the measurement of operating lease liabilities Operating Lease, Payments Physical Book Sales Through Platform Physical Book Sales through Platform [Member] Physical book sales through platform. Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Diluted net income (loss) attributable to WEBTOON Entertainment Inc. Net Income (Loss) Available to Common Stockholders, Diluted All Executive Categories All Executive Categories [Member] Common stock, $0.0001 par value (2,000,000,000 authorized, 134,635,086 shares and 130,776,161 shares issued and outstanding as of March 31, 2026, and December 31, 2025, respectively) Common Stock, Value, Issued Goodwill [Roll Forward] Goodwill [Roll Forward] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Diluted (shares) Diluted weighted-average common shares outstanding (shares) Weighted Average Number of Shares Outstanding, Diluted Commitments and Contingencies (Note 8) Commitments and Contingencies Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Total comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Entity Small Business Entity Small Business Marketing Selling and Marketing Expense [Member] Comprehensive income (loss) attributable to redeemable non-controlling interest Net Income (Loss) Attributable to Redeemable Noncontrolling Interest Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Schedule of PSU and Phantom Unit Activity Schedule of Nonvested Share Activity [Table Text Block] Gain on foreign currency, net Gain (Loss), Foreign Currency Transaction, after Tax Non- controlling interests in consolidated subsidiaries Noncontrolling Interest [Member] Document Transition Report Document Transition Report Noncontrolling Interest [Table] Noncontrolling Interest [Table] Underlying Securities Award Underlying Securities Amount Schedule of Other Assets Net [Line Items] Schedule of Other Assets Net [Line Items] Schedule of other assets net. Equity Component [Domain] Equity Component [Domain] Document Period End Date Document Period End Date Due to related parties Due To Related Parties [Abstract] Due to related parties. Schedule of Company's Long-lived Tangible Assets and Operating Lease Right-of-use Assets Long-Lived Assets by Geographic Areas [Table Text Block] PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Income Taxes Income Tax Disclosure [Text Block] Diluted earnings (loss) per share: Earnings Per Share, Diluted [Abstract] Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] Changes in operating lease liabilities Increase (Decrease) in Operating Lease Liability Total equity Beginning Balance Ending Balance Equity, Including Portion Attributable to Noncontrolling Interest Document Type Document Type Level 3 Fair Value, Inputs, Level 3 [Member] Loss per share Earnings Per Share [Text Block] Name Outstanding Recovery, Individual Name Additional paid-in capital Additional Paid in Capital Product and Service [Axis] Product and Service [Axis] Proceeds from issuance of common stock related to private placement, net Proceeds from Issuance of Common Stock Revenue Total revenue Revenue generated Revenue from Contract with Customer, Excluding Assessed Tax All Individuals All Individuals [Member] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Purchases of property and equipment Payments to Acquire Property, Plant, and Equipment Name Forgone Recovery, Individual Name Total current assets Assets, Current Statistical Measurement [Axis] Statistical Measurement [Axis] Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Measurement alternative Valuation Technique Measurement Alternative [Member] Valuation technique measurement alternative. Fair Value Measurement Inputs and Valuation Techniques [Line Items] Fair Value Measurement Inputs and Valuation Techniques [Line Items] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Foreign currency translation adjustments Goodwill, Foreign Currency Translation, Gain (Loss) Line Digital Frontier - Lease Two Lease Contractual Term, Line Digital Frontier, Lease Two [Member] Lease Contractual Term, Line Digital Frontier, Lease Two Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Net income (loss) attributable to WEBTOON Entertainment Inc. Net income (loss) attributable to WEBTOON Entertainment Inc. 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Earnings Per Share [Abstract] Contract with Customer, Sales Channel [Domain] Contract with Customer, Sales Channel [Domain] Equity Method Investments Equity Method Investments and Joint Ventures Disclosure [Text Block] Schedule of Potentially Dilutive Outstanding Securities Excluded From The Computation of Diluted Net Earnings (Loss) Per Share Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Subsidiary / equity method investee stock options Subsidiary Or Equity Method Investee Stock Options [Member] Subsidiary or equity method investee stock options member. Changes in contract liabilities Increase (Decrease) in Contract with Customer, Liability Noncontrolling Interest [Abstract] Noncontrolling Interest [Abstract] Contract with Customer, Sales Channel [Axis] Contract with Customer, Sales Channel [Axis] Shares used in computation: Weighted Average Number of Shares Outstanding, Diluted, Adjustment [Abstract] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Income taxes paid Income Taxes Paid, Net Award Timing Disclosures [Line Items] Current service costs Defined Benefit Plan, Service Cost Other assets net Other Assets, Noncurrent And Financing Receivables, Net, Noncurrent Other assets and loan receivables. Property and Equipment, net Property, Plant and Equipment Disclosure [Text Block] Total long-lived tangible assets and operating lease right-of-use assets Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization Stockholders' Equity Equity [Text Block] NAVER Naver Webtoon Company Corporation [Member] Naver webtoon company corporation. Korea KOREA, REPUBLIC OF Net income (loss) attributable to WEBTOON Entertainment Inc. Net income (loss) attributable to WEBTOON Entertainment Inc. Net Income (Loss) Attributable to Parent Expiration Date Trading Arrangement Expiration Date Non-current liabilities: Liabilities, Noncurrent [Abstract] Reclassification of long-term advances to current Noncash Transaction, Reclassification Of Long-Term Advance To Current Noncash Transaction, Reclassification Of Long-Term Advance To Current Construction in progress Construction in Progress [Member] Changes in other liabilities Increase (Decrease) in Other Operating Liabilities Schedule of Equity Method Investments Equity Method Investments [Table Text Block] Property and equipment, net Property and equipment, net Property, Plant and Equipment, Net Long-term loans, net Financing Receivable, before Allowance for Credit Loss, Noncurrent Adoption Date Trading Arrangement Adoption Date Reclassifications Reclassification, Comparability Adjustment [Policy Text Block] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Changes in receivables Increase (Decrease) in Accounts Receivable Entity Current Reporting Status Entity Current Reporting Status Customer [Axis] Customer [Axis] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Operating income (loss) Operating Income (Loss) Consolidated Entities [Domain] Consolidated Entities [Domain] Non-trade receivables Non-Trade Receivable [Member] Non-Trade Receivable Japan JAPAN Accumulated deficit Retained Earnings (Accumulated Deficit) Financial Instrument [Axis] Financial Instrument [Axis] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Executive Category: Executive Category [Axis] Currency translation differences Equity Method Investment, Currency Translation Gain (Loss) Equity Method Investment, Currency 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Income to Cash Provided by (Used in) Operating Activity [Abstract] Earnings Per Share, Basic, by Common Class, Including Two-Class Method [Table] Earnings Per Share, Basic, by Common Class, Including Two-Class Method [Table] Financing activities: Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Term deposits Time Deposits, at Carrying Value Non-Controlling Interest in Subsidiaries Noncontrolling Interest Disclosure [Text Block] Dividends Proceeds from Equity Method Investment, Distribution Cash and cash equivalents: Cash and Cash Equivalents [Abstract] Potentially dilutive outstanding securities were excluded from the computation of diluted net loss per share (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Schedule of Changes in Fair Value of Level 1 and Level 3 Assets Included Debt and Equity Securities Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Weighted average shares outstanding Weighted Average Number of Shares Outstanding, Diluted [Abstract] All Adjustments to Compensation All Adjustments to Compensation [Member] Amendment Flag Amendment Flag Leases Lessee, Operating Leases [Text Block] Termination Date Trading Arrangement Termination Date Net cash provided by financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Measure: Measure [Axis] Securities Purchase Agreement Securities Purchase Agreement [Member] Securities Purchase Agreement Valuation Approach and Technique [Axis] Valuation Approach and Technique [Axis] Long-Lived Tangible Asset [Domain] Long-Lived Tangible Asset [Domain] Basic (shares) Weighted-average common shares outstanding (shares) Weighted Average Number of Shares Outstanding, Basic Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table] Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table] Schedule of Basic and Diluted Loss Per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Related Party Transaction [Domain] Related Party Transaction [Domain] Segment Reporting [Abstract] Cost of revenue Cost of revenue Cost of revenue incurred Cost of Revenue Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Interest rate (as a percent) Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Entity Tax Identification Number Entity Tax Identification Number Actuarial gain Defined Benefit Plan, Actuarial Gain (Loss), Immediate Recognition as Component in Net Periodic Benefit (Cost) Credit Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Purchases of debt and equity securities Payments To Acquire Debt and Equity Securities Payments to acquire debt and equity securities. Consolidated Entities [Axis] Consolidated Entities [Axis] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Common stock par value (in usd per share) Common Stock, Par or Stated Value Per Share Common stock shares issued (shares) Common Stock, Shares, Issued Simple Agreement For Future Equity (SAFE) Simple Agreement For Future Equity [Member] Simple Agreement For Future Equity General and administrative expenses - non-labor related General and Administrative Expense, Non-Labor General and Administrative Expense, Non-Labor Schedule of Redeemable Noncontrolling Interest in Subsidiary Redeemable Noncontrolling Interest [Table Text Block] Schedule of Changes in Carrying Amount of Goodwill Schedule of Goodwill [Table Text Block] Interest expense Interest expense Interest Expense, Nonoperating Trading Arrangement: Trading Arrangement [Axis] Total Shareholder Return Amount Total Shareholder Return Amount Schedule of Other Non-Current Assets, net Schedule of Other Assets, Noncurrent [Table Text Block] Foreign currency translation adjustments, net of tax Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Insider Trading Arrangements [Line Items] Sumitomo Mitsui Banking Corporation Sumitomo Mitsui Banking Corporation [Member] Sumitomo Mitsui Banking Corporation Security Exchange Name Security Exchange Name Equity Securities Equity Securities [Member] Number of lease arrangements entered into Lessee, Operating Lease, Number Of Lease Arrangements Lessee, Operating Lease, Number Of Lease Arrangements Total liabilities Liabilities Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Marketing expenses incurred (cost reimbursed) Marketing Expense, Net Marketing expense incurred and cost reimbursed. Prepaid expenses Prepaid Expense, Current Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Other current liabilities Other Other Liabilities, Current Redeemable convertible preferred stock Redeemable Convertible Preferred Stock [Member] Asset Class [Domain] Asset Class [Domain] Phantom Units Phantom Share Units (PSUs) [Member] Net unrealized gain (loss) Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings Increase (Decrease) in Temporary Equity [Roll Forward] Increase (Decrease) in Temporary Equity [Roll Forward] Issuance of common stock through private placement, net Stock Issued During Period, Value, New Issues Statement [Line Items] Statement [Line Items] Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Cash and cash equivalents Cash and Cash Equivalent Fair Value Measurement Inputs and Valuation Techniques [Table] Fair Value Measurement Inputs and Valuation Techniques [Table] Counterparty Name [Axis] Counterparty Name [Axis] Common Stock Common Stock [Member] Debt Securities Debt Securities, Available-for-Sale Vested (shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Non-NEOs Non-NEOs [Member] Net increase (decrease) in cash and cash equivalents Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation