WinDirStat

WinDirStat (Windows Directory Statistics) is a powerful, open-source disk usage analyzer and cleanup tool for Windows systems. Designed to help users visualize how their storage space is being consumed, WinDirStat provides an intuitive graphical interface that makes it easy to identify large files, manage clutter, and optimize disk space. Upon scanning your hard drive, WinDirStat presents a colorful treemap where each file is represented as a colored rectangle, proportionally sized according to the file's space usage. Different file types are color-coded, enabling users to quickly spot what’s taking up room — whether it’s large video files, old backups, system logs, or forgotten downloads. Alongside the treemap, it lists file extensions, directory trees, and percentage-based statistics, giving users multiple ways to explore and understand their disk data. WinDirStat isn't just about visualization — it also includes powerful cleanup actions. Users can directly delete unnecessary files, open folders in Explorer, or jump to specific file locations with ease. It supports analyzing local drives, network drives, and even individual directories, offering flexibility for both casual users and IT professionals. Lightweight and highly customizable, WinDirStat has remained a trusted favorite for more than a decade. Whether you're freeing up space before a major update, investigating disk bloat, or simply curious about what's filling up your drive, WinDirStat is an indispensable tool for efficient storage management.