Glotaran is a Java-based graphical user interface (GUI) for the R package TIMP, designed to facilitate the analysis of multi-dimensional data, particularly time-resolved spectroscopy and microscopy datasets. TIMP, an R package for fitting superposition models to multi-dimensional data, traditionally uses a command-line interface, which can be cumbersome for users. Glotaran addresses this by providing an interactive and dynamic GUI that allows users to explore data, specify models, and view results more easily. Key features of Glotaran include interactive data exploration, visual modeling, and interactive result inspection. The application is built on the NetBeans rich client platform and communicates with R through the Java-to-R interface Rserve. The paper discusses the background, design, development, and implementation of Glotaran, highlighting its modular architecture and integration with external libraries such as JFreeChart for plotting and Rserve for communication with R. The application is open-source and available under the GNU General Public License, with binary installers for Windows, GNU/Linux, and Mac OS X. Future work includes enhancing visual compartmental modeling, adding reporting functionality, and integrating with database systems for collaborative research.Glotaran is a Java-based graphical user interface (GUI) for the R package TIMP, designed to facilitate the analysis of multi-dimensional data, particularly time-resolved spectroscopy and microscopy datasets. TIMP, an R package for fitting superposition models to multi-dimensional data, traditionally uses a command-line interface, which can be cumbersome for users. Glotaran addresses this by providing an interactive and dynamic GUI that allows users to explore data, specify models, and view results more easily. Key features of Glotaran include interactive data exploration, visual modeling, and interactive result inspection. The application is built on the NetBeans rich client platform and communicates with R through the Java-to-R interface Rserve. The paper discusses the background, design, development, and implementation of Glotaran, highlighting its modular architecture and integration with external libraries such as JFreeChart for plotting and Rserve for communication with R. The application is open-source and available under the GNU General Public License, with binary installers for Windows, GNU/Linux, and Mac OS X. Future work includes enhancing visual compartmental modeling, adding reporting functionality, and integrating with database systems for collaborative research.