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mathom is a fast, open-source disk space analyzer for Windows, published by gitRasheed and currently available at version 0.2.2, with two versions released to date. Its purpose is to help users understand how storage capacity on a drive or in a folder is being consumed, scanning the selected location and presenting where the space went through several complementary views. The results are displayed as a live-updating tree that populates as the scan progresses, a squarified treemap that visually represents the relative size of files and directories, a file-type breakdown that aggregates usage by extension or category, and an instant search function for locating specific items within the scanned data. These visualization and filtering capabilities make mathom suitable for common disk management use cases, such as identifying large files that can be archived or deleted, pinpointing directories that have grown unexpectedly, auditing storage before freeing space, and generally maintaining awareness of disk utilization on Windows systems. Performance is a central design consideration: when run as administrator, mathom reads the NTFS Master File Table (MFT) directly, enabling scan speeds described as being in the same class as WizTree, a well-known benchmark for rapid disk analysis. For situations where administrator privileges are unavailable or where MFT access is not possible, the software falls back to a portable parallel walker that still traverses the file system efficiently. This dual-mode scanning approach allows the tool to balance maximum speed with broad usability across different environments and permission levels. As an open-source project, mathom fits within the disk usage analysis and storage management category of system utilities, offering an accessible alternative for users who want fast, transparent insight into their file system without cost. With two published versions and the current release at 0.2.2, the project remains in early development while already delivering its core scanning, visualization, and search functionality for Windows users.
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