The rapid growth of the digital economy has transformed copyright into a strategic economic asset that can be commercially exploited through various digital platforms. However, the commercialization of digital content has also created legal uncertainty regarding the application of the fair use doctrine within Indonesia's copyright regime. This study aims to analyze the legal issues surrounding the commercialization of copyrighted digital content, identify the existing legal gaps in Indonesian copyright law, and formulate a legal reconstruction of the fair use doctrine that is compatible with the national legal system. This research employed normative legal research using statutory, conceptual, and comparative approaches. The study relied on primary legal materials, including copyright legislation, supported by secondary legal materials consisting of books, scholarly articles, and relevant legal literature. The findings reveal that Indonesian Copyright Law has not explicitly regulated objective parameters for determining fair use, resulting in inconsistent legal interpretation, uncertainty in law enforcement, and an imbalance between protecting copyright holders and safeguarding the public interest. The study further demonstrates that legal reconstruction should incorporate explicit indicators of fair use, strengthen legal certainty for digital commercialization, reinforce moral and economic rights, optimize digital licensing mechanisms, and improve electronic evidence systems. Such reforms are expected to establish a balanced copyright regime capable of protecting creators while encouraging innovation, freedom of expression, and the sustainable development of Indonesia's digital creative economy.