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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 bytes. more...

What's New

Version 5.3.2:

  • Dropped support for Mac OS X 10.5 Leopard.
  • The package installer and all binary products are now signed to conform with Apple's GateKeeper Technology.
  • Addressed issuse where the file names started with '.Trash'.
  • Addressed rare crash when moving duplicates into the Trash.
  • Addressed issue of incorrect Trash icon.
  • Addressed incorrect more...


  • Mac OS X 10.6 or later

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Current Version (5.x)


Downloads 200,014
Version Downloads 11,568
License Demo
Date 29 Aug 2012
Platform OS X / Intel 32
Price $12.99
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