In the article, the author reveals the essence of the concept of digital visualization of educational content as an educational product created with the help of digital tools and stored in digital format. It was found that digital educational content can be saved both on a local device and accessible on the network through computer tools. Digital visualization of educational content in the process of forming the digital competence of future mathematics teachers is positioned as a technology that provides conditions for students to create and use digital visual materials in mathematics, based on the principle of multimedia and a project approach. The stages of the technology are defined and characterized: motivational and preparatory, which involves motivating mathematics students to create digital educational content by holding motivational events (round tables, watching video materials, presentations of digital educational resources in mathematics, attending online lessons of mathematics teachers, etc.); project-research, which leads to the study of possibilities to visualize various topics from the school mathematics course, as well as the application of a project approach to the digital visualization of educational content in mathematics (mini-projects to create a visual model of the lesson, information projects to create infographics, group projects to create digital notes lectures, manuals, methodical recommendations, distance courses, etc.); content-technological, which involves the selection of digital tools for digital visualization of educational content: tools for creating infographics, mind maps, structural and logical diagrams, video materials, platforms for distance courses, software applications for digital format manuals, etc.; presentation-resultative, which actualizes the final student online conference, at which mathematics students or project groups will present the results of their work: mathematics infographics, mind maps, structural-logical schemes, video materials, distance courses, digital format manuals, etc.