Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Weighted average shares outstanding Weighted Average Number of Shares Outstanding, Diluted [Abstract] Trading Arrangement: Trading Arrangement [Axis] Schedule of Other Non-Current Assets, net Schedule of Other Assets, Noncurrent [Table Text Block] Maximum Maximum [Member] Statistical Measurement [Domain] Statistical Measurement [Domain] Title of 12(b) Security Title of 12(b) Security Subsequent Event Subsequent Event [Member] Diluted net income (loss) attributable to WEBTOON Entertainment Inc. common shareholders Net Income (Loss) Available to Common Stockholders, Diluted Document Fiscal Year Focus Document Fiscal Year Focus Discount rate (as a percent) Lessee, Operating Lease, Discount Rate Revenue remaining performance obligation expected (in years) Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Term deposits Cash Equivalent, Time Deposit, Carrying Value Option pricing model Valuation Technique, Option Pricing Model [Member] Adjustment to Compensation, Amount Adjustment to Compensation Amount Pledged Status [Axis] Pledged Status [Axis] Financial Instrument [Axis] Financial Instrument [Axis] 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] Customer [Axis] Customer [Axis] Segment Reporting [Abstract] Common stock, $0.0001 par value (2,000,000,000 authorized, 135,663,014 shares and 130,776,161 shares issued and outstanding as of June 30, 2026, and December 31, 2025, respectively) Common Stock, Value, Issued Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Other non-current assets, net Other Assets, Miscellaneous, Noncurrent Retirement Benefits Retirement Benefits [Text Block] 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 Restatement Determination Date Restatement Determination Date Second Closing Second Closing [Member] Second Closing [Member] First Closing First Closing [Member] First Closing [Member] Add: allocation to subsidiary / equity method investee participating security Participating Securities, Distributed and Undistributed Earnings (Loss), Basic Payments of severance benefits, net of cash transferred Increase (Decrease) in Obligation, Pension and Other Postretirement Benefits Amendment Flag Amendment Flag Consolidated Entities [Axis] Consolidated Entities [Axis] Current liabilities: Liabilities, Current [Abstract] Provision for credit losses Accounts Receivable, Credit Loss Expense (Reversal) Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Contingent consideration, range of outcomes, minimum (in shares) Business Combination, Contingent Consideration, Range of Outcomes, Minimum, Shares Business Combination, Contingent Consideration, Range of Outcomes, Minimum, Shares Loss Contingencies [Table] Loss Contingencies [Table] Leases [Abstract] Leases [Abstract] Consolidated Entities [Domain] Consolidated Entities [Domain] Related Party Transactions Related Party Transactions Disclosure [Text Block] Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Merchandise Sales Merchandise Sales [Member] Merchandise sales. Property, Plant, and Equipment [Abstract] Entity Address, State or Province Entity Address, State or Province Licensing Agreements Licensing Agreements [Member] PEO Total Compensation Amount PEO Total Compensation Amount Foreign currency translation adjustments, net of tax Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Common stock par value (in usd per share) Common Stock, Par or Stated Value Per Share Cash and cash equivalents: Cash and Cash Equivalents [Abstract] Non-current liabilities: Liabilities, Noncurrent [Abstract] Intangible assets, net Intangible Asset, Excluding Goodwill, after Accumulated Amortization Beginning balance (in shares) Ending balance (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Changes in accrued expenses Increase (Decrease) in Accrued Liabilities and Other Operating Liabilities Share Repurchase Program [Domain] Share Repurchase Program [Domain] Basic (in shares) Weighted-average common shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Basic Advance payments due to film production contracts, current Contract with Customer, Asset, after Allowance for Credit Loss, Current Retirement Benefits [Abstract] Retirement Benefits [Abstract] Schedule of Significant Related Party Transactions Schedule of Related Party Transactions [Table Text Block] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Loss Contingencies [Line Items] Loss Contingencies [Line Items] Number of reportable segments Number of Reportable Segments Total current liabilities Liabilities, Current Advance payments, net Advance Payments, Net, Current Advance Payments, Net, Current Limited partner commitment percentage at initial closing (as a percent) Limited Liability Company (LLC) Or Limited Partnership (LP), Limited Partner Commitment Percentage At Initial Closing Limited Liability Company (LLC) Or Limited Partnership (LP), Limited Partner Commitment Percentage At Initial Closing Entity Address, City or Town Entity Address, City or Town N Investment Co., Ltd N Investment Co., Ltd [Member] N Investment Co., Ltd [Member] Schedule of Other Assets Net [Table] Schedule of Other Assets Net [Table] Schedule of other assets net. Granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Vested (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period Line Digital Frontier - Lease One Lease Contractual Term, Line Digital Frontier, Lease One [Member] Lease Contractual Term, Line Digital Frontier, Lease One Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Reportable Segment Reportable Segment [Member] Reportable Segment Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Net income (loss) attributable to WEBTOON Entertainment Inc. common shareholders Net income (loss) attributable to WEBTOON Entertainment Inc. common shareholders Net Income (Loss) Available to Common Stockholders, Basic The Walt Disney Company (“Disney”) Subsidiary The Walt Disney Company (“Disney”) Subsidiary [Member] The Walt Disney Company (“Disney”) Subsidiary IP Adaptations I P Adaptations [Member] IP adaptations. Total other income generated from subleases Income from sublease Sublease Income Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Total other comprehensive income (loss), net of tax Other Comprehensive Income (Loss), Net of Tax Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Interest income Interest income Investment Income, Nonoperating United States UNITED STATES Subsequent Event Type [Axis] Subsequent Event Type [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Purchase of property and equipment included in accounts payable Capital Expenditures Incurred but Not yet Paid Land Land [Member] Changes in contract liabilities Increase (Decrease) in Contract with Customer, Liability Non- controlling interests in consolidated subsidiaries Noncontrolling Interest [Member] Related and Nonrelated Parties [Axis] Related and Nonrelated Parties [Axis] Non-Controlling Interest in Subsidiaries Noncontrolling Interest Disclosure [Text Block] Less: Segment Reporting, Reconciliation [Abstract] Property and Equipment, net Property, Plant, and Equipment [Text Block] Document Period End Date Document Period End Date 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] Net cash (used in) provided by investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Number of lease renewal option Lessee Operating Lease Number Of Renewal Options Lessee Operating Lease Number Of Renewal Options Basic earnings (loss) per share: Earnings Per Share, Basic [Abstract] Stockholders' Equity Equity [Text Block] Security Exchange Name Security Exchange Name Currency translation differences Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Currency Translation Differences Fair value measurement with unobservable inputs reconciliation recurring basis asset currency translation differences. Valuation Approach and Technique [Axis] Valuation Approach and Technique [Axis] Lessee, Lease, Description [Line Items] Lessee, Lease, Description [Line Items] Business Combination, Separately Recognized Transaction [Axis] Business Combination, Separately Recognized Transaction [Axis] Schedule of Significant Balances Due From and Due To Related Parties Schedule Of Related Party Balances [Table Text Block] Schedule of related party balances. Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Entity Shell Company Entity Shell Company Current portion of operating lease liabilities Operating Lease, Liability, Current Schedule of Property and Equipment, net Property, Plant, and Equipment [Table Text Block] Loss per share Earnings Per Share [Text Block] Name Outstanding Recovery, Individual Name Contribution to investment fund Contribution Investment Fund [Member] Contribution to investment fund. Income (loss) per share attributable to WEBTOON Entertainment Inc. 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Company Selected Measure Name Company Selected Measure Name Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Shares used in computation: Weighted Average Number of Shares Outstanding, Diluted, Adjustment [Abstract] Diluted earnings (loss) per share: Earnings Per Share, Diluted [Abstract] Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] Debt Securities Debt Securities [Member] Asset Class [Domain] Asset Class [Domain] Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Equity interest rate (as a percent) Equity Ownership, Excluding Consolidated Entity and Equity Method Investee, Percentage Related Party Transactions [Abstract] Related Party Transactions [Abstract] Operating activities: Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Compensation Amount Outstanding Recovery Compensation Amount Amortization expense Capitalized Contract Cost, Amortization Individual: Individual [Axis] Diluted (in shares) Diluted weighted-average common shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Diluted Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Entity Emerging Growth Company Entity Emerging Growth Company Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Related Party Transaction [Line Items] Related Party Transaction [Line Items] Estimated Useful Lives Property, Plant, and Equipment, Useful Life Schedule of Other Current Assets, net Schedule of Other Current Assets [Table Text Block] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Dividends Dividends 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 Shares eligible to be earned and vest (as a percent) Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] 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] Goodwill, net Goodwill [Text Block] Bootcamp Bootcamp [Member] Bootcamp Cash paid for amounts included in the measurement of operating lease liabilities Operating Lease, Payments Award Timing Predetermined Award Timing Predetermined [Flag] NW Webcomic Adaptation Fund, L.P. (the “Fund”) NW Webcomic Adaptation Fund, L.P. (the “Fund”) [Member] NW Webcomic Adaptation Fund, L.P. (the “Fund”) Intangible Asset, Goodwill and Other [Abstract] Intangible Asset, Goodwill and Other [Abstract] Advance payments, net Advance Payments, Net, Noncurrent Advance Payments, Net, Noncurrent Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Level 1 Fair Value, Inputs, Level 1 [Member] Business combination, contingent consideration, range of outcomes, minimum, amount Business Combination, Contingent Consideration, Range of Outcomes, Minimum, Amount Effective income tax rate (as a percent) Effective Income Tax Rate Reconciliation, Percent Redeemable Non-Controlling Interest in Subsidiary Redeemable Noncontrolling Interest [Text Block] Redeemable noncontrolling interest. Dilutive effect of stock options and unvested RSUs and PSUs (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements 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 All Executive Categories All Executive Categories [Member] Valuation Approach and Technique [Domain] Valuation Approach and Technique [Domain] Changes in operating lease liabilities Increase (Decrease) in Operating Lease Liability Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Other comprehensive income (loss): Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Schedule of Periodic Benefit Costs (Income) Schedule of Net Benefit Costs [Table Text Block] Redeemable non-controlling interest in subsidiary Balance as of January 1, Balance as of March 31, Redeemable Noncontrolling Interest, Equity, Carrying Amount Antidilutive Securities [Axis] Antidilutive Securities [Axis] Operating lease right-of-use assets Right-of-use asset Operating Lease, Right-of-Use Asset Concentration Risk Type [Domain] Concentration Risk Type [Domain] Changes in income tax receivable Increase (Decrease) in Income Taxes Receivable Renewal term Lessee, Operating Lease, Renewal Term Schedule of Basic and Diluted Loss Per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Noncontrolling Interest [Line Items] Noncontrolling Interest [Line Items] Segment and Geographic Information Segment Reporting [Text Block] Minimum Minimum [Member] Expiration Date Trading Arrangement Expiration Date Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Schedule of Revenues Disaggregated By Revenue Stream Disaggregation of Revenue [Table Text Block] Three Borrowers Customer, Three Borrowers [Member] Three borrowers. 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 General and administrative expenses - labor related General and Administrative Expense, Labor General and Administrative Expense, Labor Location, Statement of Income, Balance [Axis] Location, Statement of Income, Balance [Axis] Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Goodwill and Impairment of Goodwill Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block] Total equity Beginning Balance Ending Balance Equity, Including Portion Attributable to Noncontrolling Interest Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Buildings Building [Member] Paid Content Paid Content [Member] Paid content. Payments to acquire productive assets Business Combination, Consideration Transferred, Liabilities Incurred Business Combination [Line Items] Business Combination [Line Items] Net periodic benefit costs (income) Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Proceeds from issuance of common stock related to private placement, net Proceeds from Issuance of Common Stock Common stock shares authorized (in shares) Common Stock, Shares Authorized Antidilutive Security, Excluded EPS Calculation [Table] Antidilutive Security, Excluded EPS Calculation [Table] Shares of common stock (in shares) Sale of Stock, Number of Shares Issued in Transaction Exercise Price Award Exercise Price Investing activities: Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Related Party Transaction [Axis] Related Party Transaction [Axis] Unrecognized stock-based compensation expense Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Document Quarterly Report Document Quarterly Report 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] Segments [Domain] Segments [Domain] Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] Net Income (Loss) Net Income (Loss), Including Portion Attributable To Noncontrolling Interest And Group Equity Profit loss including Group equity. Rest of World Rest of World Rest Of The World [Member] Rest Of The World Schedule of Company's Long-lived Tangible Assets and Operating Lease Right-of-use Assets Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Long-Lived Asset [Table Text Block] Advertising Advertising [Member] Advance payments due to film production contracts Contract with Customer, Asset, after Allowance for Credit Loss, Noncurrent Convertible preferred stock Convertible Preferred Stock [Member] Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Lease Contractual Term [Axis] Lease Contractual Term [Axis] Equity method investments Beginning balance Ending balance Equity Method Investments Business Combination [Table] Business Combination [Table] Equity Component [Domain] Equity Component [Domain] PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Net unrealized gain (loss) Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings Measurement Input Type [Domain] Measurement Input Type [Domain] Reclassification of construction in progress to property and equipment Reclassification Of Construction In Progress To Property And Equipment Reclassification Of Construction In Progress To Property And Equipment Net discrete tax (benefit) expense Income Taxes, Discrete Tax Expense (Benefit), Net Income Taxes, Discrete Tax Expense (Benefit), Net Net proceeds Sale of Stock, Consideration Received on Transaction Adoption Date Trading Arrangement Adoption Date Counterparty Name [Domain] Counterparty Name [Domain] Total stockholders' equity attributable to WEBTOON Entertainment Inc. Equity, Attributable to Parent Schedule of Balances of Non-controlling Interest Minority Interest [Table Text Block] Minority Interest. Assets Assets [Abstract] Title Trading Arrangement, Individual Title Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Number of shares to acquire (in shares) Business Combination, Consideration Transferred, Equity Interest, Share Issued, Number of Shares Accounting Policies [Abstract] Accounting Policies [Abstract] Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Interest rate (as a percent) Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Lease obligation Operating Lease, Liability Insider Trading Policies and Procedures [Line Items] Schedule of PSU and Phantom Unit Activity Schedule of Nonvested Share Activity [Table Text Block] Other financing activities Proceeds from (Payment for) Other Financing Activity Allowances for credit losses Accounts Receivable, Allowance for Credit Loss, Current Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Business Combination, Separately Recognized Transaction [Domain] Business Combination, Separately Recognized Transaction [Domain] Performance Stock Units Performance Shares [Member] Loans receivables Loans Receivable [Member] Prepaid expenses and other current assets, net Total other current assets, net Prepaid Expense and Other Assets, Current Deferred tax benefit Deferred Income Tax Expense (Benefit) Phantom Units Phantom Share Units (PSUs) [Member] Business Combination [Domain] Business Combination [Domain] Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Line Items] Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Line Items] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Marketing expenses incurred (cost reimbursed) Marketing Expense Incurred (Reimbursed) Marketing Expense Incurred (Reimbursed) 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 Restricted Stock Units Restricted Stock Units (RSUs) [Member] Schedule of Changes in Carrying Amount of Goodwill Goodwill [Table 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] Common stock issuable as percentage of outstanding (as a percent) Business Combination, Shareholder Agreement Maximum Common Stock Issuable As Percentage Of Outstanding Business Combination, Shareholder Agreement Maximum Common Stock Issuable As Percentage Of Outstanding Entity Central Index Key Entity Central Index Key Less: Accumulated depreciation Property, Plant, and Equipment, Accumulated Depreciation, Depletion, and Amortization All Adjustments to Compensation All Adjustments to Compensation [Member] Business Combination [Axis] Business Combination [Axis] Equity [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] Net cash used in operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Income Statement [Abstract] Income Statement [Abstract] Stockholders' equity: Equity, Attributable to Parent [Abstract] Document Transition Report Document Transition Report Ownership [Axis] Ownership [Axis] Sales and settlement Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Sales and Settlement Fair value measurement with unobservable inputs reconciliation recurring basis asset sales and settlement. Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Investment, Name [Axis] Investment, Name [Axis] RI Games Holdings, Inc. RI Games Holdings, Inc. [Member] RI Games Holdings, Inc. Deferred tax assets Deferred Income Tax Assets, Net Unvested RSUs Unvested Restricted Stock Unit's [Member] Unvested restricted stock unit's member. Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Munpia Munpia [Member] Munpia Other Commitments [Domain] Other Commitments [Domain] City Area Code City Area Code Marketing Marketing Marketing Expense Accumulated other comprehensive loss AOCI Attributable to Parent [Member] All Individuals All Individuals [Member] Subsequent Events Subsequent Events [Text Block] Loan receivables Financing Receivable, Excluding Accrued Interest, after Allowance for Credit Loss, Noncurrent Volatility Measurement Input, Price Volatility [Member] Defined severance benefits Liability, Defined Benefit Pension Plan, Noncurrent Name Forgone Recovery, Individual Name Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Unrecognized stock-based compensation expense, period for recognition (in years) Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Debt and equity securities realized gain or loss Debt and Equity Securities, Realized Gain (Loss) Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Weighted Average Grant-Date Fair Value Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Statement [Line Items] Statement [Line Items] 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 Total assets Assets Entity [Domain] Entity [Domain] Private equity securities Private Equity Funds [Member] Contractual obligation revenue Business Combination, Contractual Obligation Revenue Threshold To Trigger Obligation Business Combination, Contractual Obligation Revenue Threshold To Trigger Obligation Performance Stock Units Share-Based Payment Arrangement [Policy Text Block] Interest expense Interest expense Interest Expense, Nonoperating Subsidiary and equity method investee earnings adjustment for dilutive securities Participating Securities, Distributed and Undistributed Earnings (Loss), Diluted Schedule of Compensation Expenses for All Stock-Based Payment Arrangements Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] Stock-Based Compensation Share-Based Payment Arrangement [Text Block] Leasing office space Office Space Lease [Member] Office space lease. Three Payment Gateways Companies Customer, Three Payment Gateways Companies [Member] Three payment gateways companies. Changes in other assets Increase (Decrease) in Other Operating Assets Issuance of common stock through private placement, net (in shares) Stock Issued During Period, Shares, New Issues PEO PEO [Member] N Investment Co., Ltd. (“N Investment”) N Investment Co., Ltd. (“N Investment”) [Member] N Investment Co., Ltd. (“N Investment”) Compensation expenses Stock-based compensation Share-Based Payment Arrangement, Expense Other non-current liabilities Other Liabilities, Noncurrent Goodwill, net Goodwill net, Beginning Balance Goodwill net, Ending Balance Goodwill Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Fair Value Measurement Inputs and Valuation Techniques [Line Items] Fair Value Measurement Inputs and Valuation Techniques [Line Items] 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 Customer liability revenue recognized during the period Contract with Customer, Liability, Revenue Recognized Achieved in Stages, Preacquisition and Acquired Equity Interests in Acquiree (as a percent) Business Combination, Achieved in Stages, Preacquisition and Acquired Equity Interests in Acquiree, Percentage Subsequent Event Type [Domain] Subsequent Event Type [Domain] Accumulated deficit Retained Earnings [Member] Long-term operating lease liabilities Operating lease liabilities Operating Lease, Liability, Noncurrent Taxes payable Taxes Payable, Current 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 Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Schedule of Ranges of Significant Unobservable Inputs Used to Value Level 3 Assets Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Common stock outstanding (in shares) Beginning balance (in shares) Ending balance (in shares) Common Stock, Shares, Outstanding Award Timing Disclosures [Line Items] Diluted (in usd per share) Diluted earnings (loss) per share (in usd per share) Earnings Per Share, Diluted Entity Current Reporting Status Entity Current Reporting Status Due from related parties Due From Related Parties [Abstract] Due from related parties. Net cash provided by financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Total Shareholder Return Amount Total Shareholder Return Amount Ownership [Domain] Ownership [Domain] Lease Contractual Term [Domain] Lease Contractual Term [Domain] Adjustments to reconcile net loss to net cash used in operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Share-Based Payment Arrangement [Abstract] Share-Based Payment Arrangement [Abstract] Equity-based compensation and others Stock Issued During Period, Other And Adjustments To Additional Paid-In Capital, Sharebased Compensation Requisite Service Period Recognition Value Stock Issued During Period, Other And Adjustments To Additional Paid-In Capital, Sharebased Compensation Requisite Service Period Recognition Value Financing activities: Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Revenue Total revenue Revenue generated Revenue from Contract with Customer, Excluding Assessed Tax Property and equipment, net Property and equipment, net Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization Interest expense Defined Benefit Plan, Interest Cost Ownership interest (as a percent) Limited Liability Company or Limited Partnership, Members or Limited Partners, Ownership Interest Financial Instruments [Domain] Financial Instruments [Domain] Schedule of Equity Method Investments Equity Method Investments [Table Text Block] Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Underlying Securities Award Underlying Securities Amount Payment made for short-term investments Payments to Acquire Short-Term Investments Total comprehensive income (loss) attributable to non-controlling interests and redeemable non-controlling interests Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Revenue Revenue from Contract with Customer [Text Block] Issuance of common stock through private placement, net Stock Issued During Period, Value, New Issues Unvested PSUs Unvested Performance Stock Unit's [Member] Unvested Performance Stock Unit's Prepaid expenses Prepaid Expense, Current Construction in progress Construction in Progress [Member] Other investing activities Payment for (Proceeds from) Other Investing Activity Contract with Customer, Sales Channel [Axis] Contract with Customer, Sales Channel [Axis] Related Party Transaction [Table] Related Party Transaction [Table] Share of other comprehensive loss of equity method investments, net of tax Equity in income of equity method investees Share of other comprehensive income (loss) OCI, Equity Method Investment, after Tax Other current assets Other Assets, Current Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] All Trading Arrangements All Trading Arrangements [Member] Other Performance Measure, Amount Other Performance Measure, Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Operating income (loss) Operating Income (Loss) Revenue remaining performance obligation Revenue, Remaining Performance Obligation, Amount Current Fiscal Year End Date Current Fiscal Year End Date Provisions and defined pension benefits Provisions and Defined Pension Benefits Liability, Current Provisions and defined pension benefits. Physical Book Sales Through Platform Physical Book Sales through Platform [Member] Physical book sales through platform. 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Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] Net income (loss) attributable to non-controlling interests and redeemable non-controlling interests Net Income (Loss) Attributable to Noncontrolling Interest Due to related parties Due To Related Parties [Abstract] Due to related parties. Deferred tax liabilities Deferred Income Tax Liabilities, Net Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Defined severance expense Defined Contribution Plan, Cost Entity Small Business Entity Small Business Total comprehensive income (loss) attributable to WEBTOON Entertainment Inc. 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NW Webcomic Adaptation Fund, L.P. [Member] NW Webcomic Adaptation Fund, L.P. 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Investment, Name [Domain] Investment, Name [Domain] Customer [Domain] Customer [Domain] Leases Lessee, Operating Leases [Text Block] Basic (in usd per share) Basic earnings (loss) per share (in usd per share) Earnings Per Share, Basic Measurement Input Type [Axis] Measurement Input Type [Axis] Contract liabilities Contract with Customer, Liability, Current Total current assets Assets, Current Statistical Measurement [Axis] Statistical Measurement [Axis] Insider Trading Arrangements [Line Items] Other assets net Other Assets, Noncurrent And Financing Receivables, Net, Noncurrent Other assets and loan receivables. Cost of revenue Cost of revenue Cost of revenue incurred Cost of Revenue Award Type Award Type [Axis] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Receivables, net of allowance for credit losses of $1,917 and $3,378 at June 30, 2026, and December 31, 2025, respectively Receivables, net Receivables Accounts Receivable, after Allowance for Credit Loss, Current Accumulated deficit Retained Earnings (Accumulated Deficit) NAVER Naver Webtoon Company Corporation [Member] Naver webtoon company corporation. 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Parent [Member] Other income, net Other Operating Income (Expense), Net Name Awards Close in Time to MNPI Disclosures, Individual Name 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] Forfeited (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Funded capital at initial closing limited partnership Funded capital at initial closing limited partnership Increase (Decrease) in Other Commitment Increase (Decrease) in Other Commitment Schedule of Redeemable Noncontrolling Interest in Subsidiary Redeemable Noncontrolling Interest [Table Text Block] General and administrative expenses General and administrative expenses General and administrative expenses incurred General and Administrative Expense Long-Lived Asset, Class [Domain] Long-Lived Asset, Class [Domain] Property, Plant, and Equipment [Table] Property, Plant, and Equipment [Table] Adjustment to Compensation: Adjustment to Compensation [Axis] Comprehensive income (loss) attributable to redeemable non-controlling interest Net Income (Loss) Attributable to Redeemable Noncontrolling Interest Share Repurchase Program [Axis] Share Repurchase Program [Axis] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Interest paid Interest Paid, Excluding Capitalized Interest, Operating Activity Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Commitment Other Commitment Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Securities Purchase Agreement Securities Purchase Agreement [Member] Securities Purchase Agreement Name Measure Name Income Taxes Income Tax Disclosure [Text Block] Accounts payable Accounts Payable, Current Pay vs Performance Disclosure [Line Items] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Other non-cash items Other Noncash Income (Expense) Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Redice acquisition, cash consideration, second closing Business Combination, Consideration Transferred Additional paid-in capital Additional Paid-in Capital [Member] Entity Filer Category Entity Filer Category Equipment Equipment [Member] Investment company, committed capital Investment Company, Committed Capital Name Trading Arrangement, Individual Name Cash and cash equivalents Cash and Cash Equivalent Business disposition Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Business Disposition Fair value measurement with unobservable inputs reconciliation recurring basis asset business disposition. Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Loss on debt and equity securities, net Debt and Equity Securities, Gain (Loss) Company Selected Measure Amount Company Selected Measure Amount Purchases of debt and equity securities Payments To Acquire Debt and Equity Securities Payments to acquire debt and equity securities. Schedule of Reconciliation of Profit (Loss) from Segments to Consolidated Segment Reporting, Reconciliation of Profit (Loss) by Segment to Consolidated [Table Text Block] Equity Method Investments and Joint Ventures [Abstract] Equity Method Investments and Joint Ventures [Abstract] Depreciation and amortization Depreciation, Depletion and Amortization 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 Entity Address, Address Line Two Entity Address, Address Line Two Stock, Class of Stock [Table] Stock, Class of Stock [Table] Net income (loss) Net income (loss) Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Business Combination, Price Per Share Business Combination, Price Per Share Equity securities measurement input Equity Securities, FV-NI, Measurement Input Contract with Customer, Sales Channel [Domain] Contract with Customer, Sales Channel [Domain] Current assets: Assets, Current [Abstract] Non-PEO NEO Non-PEO NEO [Member] Entity Address, Address Line One Entity Address, Address Line One Right-of-use assets obtained in exchange for operating lease liabilities Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Vested (in usd per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Limited partner commitment percentage at subsequent anniversaries (as a percent) Limited Liability Company (LLC) Or Limited Partnership (LP), Limited Partner Commitment Percentage At Subsequent Anniversaries Limited Liability Company (LLC) Or Limited Partnership (LP), Limited Partner Commitment Percentage At Subsequent Anniversaries Income tax benefit (expense) Income tax expense (benefit) Income tax (benefit) expense Income Tax Expense (Benefit) Investments in and Advances to Affiliates, at Fair Value [Roll Forward] Investments in and Advances to Affiliates, at Fair Value [Roll Forward] Sumitomo Mitsui Banking Corporation Sumitomo Mitsui Banking Corporation [Member] Sumitomo Mitsui Banking Corporation Customer Concentration Risk Customer Concentration Risk [Member] Award Timing Method Award Timing Method [Text Block] Net increase in cash and cash equivalents Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Number of lease arrangements entered into Lessee, Operating Lease, Number Of Lease Arrangements Lessee, Operating Lease, Number Of Lease Arrangements Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Korea Korea KOREA, REPUBLIC OF Change in severance benefit, net Pension and Other Postretirement Benefits Expense (Reversal of Expense), Noncash Net income (loss) attributable to WEBTOON Entertainment Inc. Net income (loss) attributable to WEBTOON Entertainment Inc. Net Income (Loss) Attributable to Parent Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Marketing expenses incurred (cost reimbursed) Marketing Expense, Net Marketing expense incurred and cost reimbursed. Proceeds from sale of property and equipment Proceeds from Sale of Property, Plant, and Equipment Statement [Table] Statement [Table] Redeemable convertible preferred stock Redeemable Convertible Preferred Stock [Member] Restatement Determination Date: Restatement Determination Date [Axis] Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table] Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table] Japan Japan JAPAN Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block]