Judicial review is a constitutional mechanism that functions to uphold constitutional supremacy while ensuring that legislative products conform to the principles of a democratic rule of law. This study aims to analyze the effectiveness of judicial review in safeguarding constitutional supremacy and legislative quality, as well as to examine the urgency of strengthening this mechanism within contemporary legal development. The research employs a normative legal method with a comparative approach by examining the provisions of the 1945 Constitution of the Republic of Indonesia, Law Number 24 of 2003 concerning the Constitutional Court as amended by Law Number 7 of 2020, and Law Number 12 of 2011 concerning Law-Making as amended by Law Number 13 of 2022. The analysis is supported by scholarly literature published over the last five years concerning judicial review, constitutional supremacy, and legislative quality. The findings indicate that judicial review effectively maintains the consistency of legal norms with constitutional principles, protects constitutional rights, strengthens checks and balances, and promotes higher legislative quality. Furthermore, strengthening judicial review has become increasingly necessary to address the growing complexity of law-making processes, enhance legal certainty, and support constitutional democratic governance. Therefore, judicial review should continue to be reinforced as a primary instrument for ensuring constitutional compliance and improving legislative quality.