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WhatSize allows you 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. WhatSize helps find out what files are taking up all of that space. Then it makes it really easy to remove or move those files. You'd be surprised how many useless files are lying around on your Mac's hard disk.

While the app is measuring a folder the user can browse the files within that folder and immediately see the size in

What's New

Version 6.5.4:
  • Improvements to handle TimeMachine volumes on remote machines or on external drives.
  • Improvements to physical (On Disk) file size accuracy.
  • Better support for SMB mounted volumes.
  • General bug fixes.


  • OS X 10.8 or later

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3.3 144


Current Version (6.x)


Downloads 226,286
Version Downloads 1,708
License Shareware
Date 12 Jan 2017
Platform Intel 64 / OS X
Price $29.99