PIVARČEKOVÁ, Nikola. 2019. Brand building through online marketing. [Diploma Thesis] Technical University in Zvolen, University Study Program: Economics and management of natural resources. Thesis supervisor: Ing. Daniel Halaj, PhD. Level of professional qualification: Master ´s degree – inžinier, abbreviation „Ing.“. Zvolen: TU, 2019. 63 p.The diploma thesis deals with the topic of brand building through online marketing of the selected company. It analyses the tools that are currently used in online communication and branding environments. The theoretical part is devoted to marketing, namely marketing of services and online marketing, definition of brand and its elements. The practical part is devoted to the analysis of customer satisfaction with the services provided by the selected company and the analysis of the company website. The goal of the thesis is to design tools for building a brand of a company through online tools. The conclusion is devoted to a specific suggestion.