SATDBailiff is a Java tool designed to mine the empirical history of SATD instances from Java project Git repositories on a large scale. This is done with the goal of tracking the additions, removals, and changes to SATD instances that occur during the process of software development. SATDBailiff’s output can be used to better understand the prominence of SATD in software projects at different points over the course of those projects’ lifetimes, while also offering new ways to interpret and visualize those SATD instances. While SATDBailiff accomplishes its objective using a state-of-the-art classification model and a scalable output format, the tool was also designed with modularity in mind, to allow for the implementation of new classification models and output formats.