Disk Usage Viewer

A read-only macOS terminal disk usage browser and ncdu alternative, with Finder reveal support, live incremental scanning, and scrolling support.

Build:

swift build -c release

Run from the directory you want to inspect:

path/to/rdu/.build/release/rdu

Controls:

• Up arrow / down arrow or mouse wheel: move the selected row
• Type letters, numbers, or .: show only items starting with those characters
• Backspace: undo the current filter
• Right arrow: enter the selected folder
• Left arrow: return to the parent folder, stopping at the launch directory
• Enter: reveal the selected folder or file in Finder
• Ctrl-C: quit

The viewer does not write, delete, or modify the inspected files. Folder sizes are scanned directly from the filesystem on a single background scanner queue and cached. During a scan, files in the current directory are shown first, folders appear with per-directory progress as they are scanned, and navigation remains usable.

The row bar is scaled against the biggest visible item in the current directory.