International organisations play a vital role in shaping and implementing international norms and standards, contributing to the development of international law. This paper focuses on the United Nations (UN) as a prominent international organisation and examines its role in developing and implementing international law. Specialized entities within the UN, such as the International Court of Justice (ICJ), the United Nations General Assembly (UNGA), and the International Law Commission (ILC), have played significant roles in the development, codification, and implementation of international law. The UN serves as a platform for ongoing dialogue, identifies emerging challenges, formulates international legal and policy instruments, provides mechanisms for peaceful settlement of disputes, and collaborates with other international and regional organisations. However, this paper also acknowledges the inherent challenges and shortcomings of the UN and explores proposals for UN reform to address these issues, enhance its influence, and better fulfil its overarching purpose. Through an analytical assessment of the UN’s role and influence on international law, this paper aims to provide insights into the functioning of international organisations and their impact on shaping global legal norms.