WhatSize is a powerful file management app for Mac and Windows that allows users to quickly and easily manage their disk space by analyzing their disk usage and creating a detailed report on the size of each file. It provides an easy to read graphical representation of file size and folder size, enabling users to drill down into their disk structure and quickly identify large files that can be deleted or moved to free up disk space. It also helps users find duplicate files, reclaim disk space from old applications, and identify other potential disk space issues. WhatSize also features a powerful search engine to help users find files quickly and easily.
Discontinued The program seems to be no longer updated. The latest version, 2.13, released in July 2012, is fully functional and can still be downloaded from the official website.