Web-application for real-time big data visualization of complex physical experiments This article examines a tool that provides a flexible user interface for representing the status of various physical experiments using different visualization approaches. These experiments produce large volumes of heterogeneous data in real-time, therefore the data processing procedure is complicated. Web-based application is suggested for implementation which involves the possibility of remote using the tool by users regardless of their operating system and device type (mobile, desktop). The application of the architectural style REST simplified the component implementation, improved the effectiveness of performance tuning. Frequent changes in experimental setting require the method for adapting the visualization screens. For this reason, the graphical user interface builder to arrange graphical control elements using a drag-and-drop technology and WYSIWYG editor was created. The designed system is a step in the development of applied information technology systems which allows specialists from different fields of science to analyze heterogeneous data of physical experiments more effectively.