An integrated consideration of digital inequalities in smart cities is relatively new to most discussions of the subject, and an applicable research framework for the assessment and management of digital inequalities in the smart city is still lacking. This paper proposes a framework for an action-oriented approach to analyse and strategically reduce digital injustices in smart cities. There are five requirements for creating digital justice: the availability of a concept with sufficiently allocated resources, the availability of digital infrastructures and technologies, programmes for learning digital competencies, offerings for citizen participation and a holistic perspective on the global dimensions of digital justice. For different case studies, we assess the coverage, integration and impact of these features. The analysis confirms that the proposed methodological approach can record and evaluate strategies for digital participation in smart cities.