Apps similar to WhatSize include WinDirStat, which is free and open source. Other options are WizTree, Baobab Disk Usage Analyzer, Filelight and TreeSize. Disk Usage Analyzers like WhatSize are a crowded field, with more than 50 alternatives for Windows, Mac, Linux, the web and Android.
Native macOS disk analyzer that scans folders and space, presenting file-type treemaps or ring charts beside a Finder-style outline. It can reveal items, send them to Trash after confirmation, flag caches and build output, and offer an optional read-only JSON CLI.
Canada
MacDirStat is a free, open-source disk space analyzer for macOS, inspired by WinDirStat. It scans a drive or folder and draws every file as a color-coded rectangle sized by its disk usage, so the biggest files and folders stand out at a glance.
United States
Find what is filling a disk, mark what should go, and remove it — with the volume's free space in view the whole time.
Canada
StorageRadar maps your disk, shows blocked paths instead of hiding them, lets you dry-run cleanup, and compares what changed over time. Scan data stays local, while analytics and diagnostics remain separately controllable in settings.
Thailand
