Rising disease burden and health inequalities remain global concerns, highlighting the need for health systems strengthening with a sufficient and appropriately trained workforce. The current models for developing such a workforce are inadequate and newer approaches are needed. In this paper we describe a model for public health capacity building through online Global Learning, defined as 'innovative, integrated, global opportunities for capacity building through online learning and shared experiences between and within Low- to Middle- Income Countries and High-Income Countries, in a continuous process that helps health care workers learn as they progress through their careers'. We demonstrate how two programmes, 'Peoples-uni' and 'NextGenU.org', have implemented this model using a mix of low-cost and free online learning courses, a global community of volunteer tutors, mentors and peers, and appropriate high quality competence-based content.