Yes, ad blockers are legal in Brazil, but their use is subject to compliance with consumer protection and data privacy laws enforced by local authorities.
Ad blockers operate within Brazil’s legal framework as long as they do not violate provisions on fair competition, consumer rights, or unauthorized data interception. The Brazilian Consumer Defense Code (CDC) and the General Data Protection Law (LGPD) impose indirect constraints, particularly when ad blocking disrupts essential services or collects user data without consent. Recent 2026 amendments to the Marco Civil da Internet (Law No. 12.965/2014) introduce stricter obligations for intermediaries, including ad-blocking service providers, to ensure transparency and user autonomy. Courts have not yet issued definitive rulings on ad blockers, but regulatory bodies like the National Consumer Secretariat (SENACON) and the Brazilian Data Protection Authority (ANPD) monitor compliance with data minimization principles.
Key Regulations for Ad Blockers in Brazil
- Consumer Protection Compliance: Ad blockers must not impair access to mandatory public service information or violate the CDC’s provisions on abusive practices (Art. 39, CDC).
- Data Privacy Alignment: Under LGPD, ad blockers collecting user data for profiling must obtain explicit consent and adhere to purpose limitation (Art. 6, LGPD).
- Intermediary Liability: Providers of ad-blocking tools may be held liable if their services facilitate copyright infringement or circumvent digital rights management (DRM) systems, per the 2026 updates to the Marco Civil da Internet.