The rapid development of the times supported by advances in technology and information has provided convenience to financial institutions in Indonesia, this is supported by the emergence of online loans. As a result of this change, many communities are helped and experience problems. The problems arise due to the emergence of illegal online loans, so the government formed an OJK Institute to supervise and resolve illegal Online Loans. The research method used is a normative juridical law research method and uses secondary data, which includes primary legal material, secondary legal material and tertiary legal material. The data collection techniques used are library research and analyzing data with the nature of qualitative analysis. The results show that OJK has an important role as an online lending regulator in Indonesia, with the main legal basis in the form of Law Number 21 of 2011 and OJK Regulation Number 77 / POJK.01 / 2016. In supervising Online Loans, OJK collaborates with the Investigation Alert Task Force (SWI) to crack down on illegal Online Loan operators. OJK supervision includes registration, licensing, provisions, and regulations with steps to accept registration, risk evaluation, and license revocation if necessary. Although OJK faces limitations in handling illegal P2P lending, efforts continue to be made to minimize the growth of illegal Pinjol. Through various mechanisms, OJK strives to create a healthy, safe, and reliable Pinjol industry environment.