Yes, ad blockers are legal in South Korea, but their use is subject to strict regulations under the Act on Promotion of Information and Communications Network Utilization and Information Protection (Network Act) and the Fair Transactions in Online Platforms Act. While blocking ads is permitted, publishers and platforms may enforce countermeasures under the 2026 Online Platform Fairness Guidelines, which restrict circumvention tactics that harm legitimate business operations.
Key Regulations for Ad Blockers in South Korea
- Network Act Compliance: Ad blockers must not interfere with mandatory disclosures (e.g., legal notices) or disrupt essential service functions, as defined by the Korea Communications Commission (KCC).
- Fair Transactions Act Restrictions: Platforms may prohibit ad-blocking if it violates terms of service, particularly for subscription-based or ad-supported content, per the Fair Trade Commission’s 2024 enforcement rules.
- Anti-Circumvention Clauses: The 2026 Guidelines explicitly prohibit techniques like DNS manipulation or deep packet inspection to bypass ad delivery, classifying such actions as unfair trade practices under the Monopoly Regulation and Fair Trade Act.