dumap review
An open-source desktop tool for exploring directory sizes in a color-coded treemap.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
dumap is an open-source disk usage visualizer for people who want to inspect storage consumption by directory on Windows, macOS, or Linux. Its native desktop GUI presents scanned files and folders as an interactive treemap, making it suited to solo users and small teams who prefer a visual overview to a list of paths and sizes. File-type color categories add another way to distinguish what occupies space, while the option to exclude hidden files lets users adjust the scan view.
Navigation is built around exploration: click-to-zoom reveals a selected area in more detail, and breadcrumb navigation helps move back through the directory hierarchy. Depth controls are also described by the project. A useful distinction is the choice between scanning logical size and disk usage, so users can inspect either measure rather than treating them as interchangeable. The tool’s focus remains on scanning directories and visualizing their contents; choose a different product if duplicate detection, scan history, or dedicated external-drive workflows are central to your needs.
For sharing or viewing a scan outside the desktop interface, dumap offers a command-line export mode that creates a self-contained HTML treemap openable in a browser. The Rust application supports GUI environments on all three listed desktop platforms, and it is distributed as open source rather than through commercial plans. Support channels are community and documentation, which fits users comfortable with a community-supported project. Pick dumap for cross-platform treemap exploration and HTML output; look elsewhere if you need a wider storage-management feature set or a vendor support channel beyond community resources and docs.
dumap pros and cons
- Where it wins
- Native GUI treemap with click-to-zoom and breadcrumb navigation
- Color-codes files by type and can exclude hidden files
- Exports a self-contained HTML treemap; scans logical size or disk usage
- Where it doesn't
- Focused on directory scans rather than broader storage management
- No verified duplicate detection, external-drive scanning, or scan history
- Support is through community and documentation
dumap fact sheet, pricing and score →
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