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WhatSize for Mac

By ID-Design Free to try Editors' Rating

Key Details of WhatSize

  • Measure sizes of your files and folders
  • Last updated on 08/14/20
  • There have been 2 updates within the past 6 months
  • The current version has 0 flags on VirusTotal badge_icon

Editors' Review Staff Dec 2, 2014

WhatSize for Mac provides a visual overview of what's on your machine and helps you clean out unnecessary items.


Multiple views, multiple tools: WhatSize offers browser, outline, table, and pie chart views. After deciding what you want to delete, you can utilize the cleaner, duplicate finder, and delocalizer.

Color coding: Folders greater than 1GB are colored red, greater than 1MB are colored purple, and greater than 1 byte are colored green. This makes it easy to see areas of concern at a glance.

Thorough documentation: A 30-page PDF provides plenty of information about WhatSize and how it works.


Not for novices: WhatSize was designed for users familiar with basic file management.

Bottom Line

WhatSize for Mac has a streamlined interface and offers a number of tools for quickly assessing the sizes of files on your machine and making decisions about what to do with them. However, if you're not knowledgeable about file types, you may want to seek an alternative solution.

Editors' note: This is a review of the trial version of WhatSize for Mac 6.1.2.

Full Specifications

What's new in version 7.4.4

  • When measuring a parent folder, children that are present on the SideBar are automatically updated
  • Addressed a small issue when handling the Request Activation Reset
  • Added 'Empty Trash' menu item to empty the trash using Finder
  • File counts are properly updated when the app performs background updates


Release August 14, 2020
Date Added August 14, 2020
Version 7.4.4

Operating Systems

Operating Systems Macintosh
Additional Requirements
  • macOS Catalina
  • macOS Mojave
  • macOS High Sierra
  • macOS Sierra


Total Downloads 25,485
Downloads Last Week 2
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Developer's Description

WhatSize is a simple tool that allows the user to quickly measure the size in bytes of a given folder and all subfolders and files within it. You would be surprised at how many useless files might be laying around on your hard disks. The files and folders are automatically sorted by size, with the biggest sizes first. While the app is measuring a folder the user can browse the files within that folder and immediately see the size in bytes. Hidden files, cache files, directories will all show up with their corresponding size. This application is similar to the ancient NeXTSTEP, DarkForest. Once the measuring of a folder has ended the user can also view the information by filtering for particular file sizes or types. The user can also move unwanted files and folder in the corresponding Trash bin similar to the Finder's Delete button.