DiskMap review
A free Windows analyzer for detailed filesystem scans, visual reports, duplicates, and cleanup.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
DiskMap is a free Windows desktop disk-usage analyzer for locating where local storage is being used. It scans files and folders with recursive or direct NTFS Master File Table engines, then presents results through file trees, treemaps, and sunburst visualizations. File-type coloring, filtering, and grouping help organize findings, while duplicate detection adds a practical way to identify repeated content. Because it runs locally without an account, cloud service, or telemetry, it suits Windows users who want filesystem-level inspection on their own machine.
Its strongest advantage is the depth of its storage analysis. Advanced filesystem details include hard links and alternate data streams, while scan history and snapshot comparison support checking how storage changes over time. Crash-safe scan resume and memory-saving options are useful for larger scans or interruptions. The combination of NTFS-focused engines, visual views, file-type breakdowns, and filtering gives DiskMap a broader analysis toolkit than a basic folder-size viewer.
DiskMap also includes built-in cleanup for temporary files, caches, reports, and Recycle Bin items, keeping inspection and removal in one application. Its main boundary is platform scope: it is designed for Windows rather than cross-platform use. It also does not provide an application-size view, and its proprietary source means it is not an open-source option. Choose DiskMap for free, local Windows analysis with detailed filesystem features; choose an alternative if you need macOS or Linux support, application-level size reporting, or open-source code.
DiskMap pros and cons
- Where it wins
- NTFS MFT scanning exposes detailed filesystem information
- Treemap and sunburst views make storage patterns easier to inspect
- Includes duplicate detection, history comparison, and cleanup tools
- Where it doesn't
- Runs only on Windows
- Does not provide an application-size view
- Source code is proprietary rather than open source
DiskMap fact sheet, pricing and score →
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