The paper deals with the development of an Internet application that deals with the visualization of business dana through the D3.js library. The web application is created with D3.js library which is used to manipulate documents based on dana. D3 brings datasets to life using HMTL, SVG and CSS through which it combines powerful visualization components and a dana-based approach to DOM manipulation. The paper will show the steps of creating an Internet application created using Visual Studio Code tool. The application will have the ability to load a dataset in a .csv format, after which the user will be shown all possible variables extracted from the dataset. The user selects a specific variable and the graph he wants, after which a graph is drawn in front of the user using the d3.js library. The production is divided into two parts, frontend and backend. As React.js is one of the most popular user interface technologies, due to its optimization and speed of retrieving dana through React states, this technology will be use din the frontend chapter. As for the backend part, Node.js technology will be used, and PostgreSQL as the database. In addition to creating the application, the paper will present mockups of the target application to show the process of planning and creating the user interface, creating a component for React.js technology through which the user interface is made, creating the server and its endpoints, and using the database. At the end of the paper, we go through the advantages and disadvantages of the d3.js library, and its contribution to Internet development.