WinDirStat is a disk usage visualizer and storage analysis tool designed to scan drives and represent file and folder sizes. It functions as a system for calculating subtree sizes and identifying storage bottlenecks on a local file system.
The utility distinguishes itself through a proportional treemap and an interactive directory tree, where the area of each block corresponds to the size of the file. It utilizes an extension-based color mapping system to categorize data types visually and provides a reporter that aggregates storage consumption by file type.
The software covers broad storage analysis capabilities, including duplicate file detection through content hashing and large file identification. It also includes file search and filtering using regular expressions, real-time file system monitoring, and disk cleanup utilities for removing unnecessary files.