The digital transformation of the core activities of small and medium-sized entrepreneurs is in an active phase, driven by several reasons, including increased investments in digital technologies, growth in data volumes and analysis options, heightened competitive pressure, the pace of technological change, the popularity of digital communication channels, and responses to global trends. Therefore, the research aims to identify the tools and methods for the digital transformation of the core activities of small and medium-sized entrepreneurs (specifically, the business processes that constitute their primary operations and generate the main revenue stream). Within the research, it is emphasized that the digital transformation of the core activities of small and medium-sized entrepreneurs is based on the rethinking and transformation of fundamental business processes. The authors have demonstrated that considering the extensive scope of such entrepreneur’s activities, this means that they must quickly change their business approaches without jeopardizing their overall viability.