This article presents a method for assessing the walkability of the high streets in the city centres in Czech cities, which can be employed as a decision-support tool for sustainability-oriented planning or eventually urban design. The main aim of this article is to construct and tested a composite walkability index of urban quality design at the micro-level. The basic framework for the construction of the walkability index was the urban design qualities proposed by Ewing and Clemente (2013), which were modified for the Czech context. In doing so, we set up a list of indicators suitable for urban audit of the Czech high streets. Then, the weights of the indicators were assessed by an expert questionnaire survey (n=50). The platform for urban audit was created in ArcGis, using Survey123 application. User "friendliness" and simplicity were the guiding principle in designing the platform scheme, in order to ensure the use of the proposed framework in practice.