Windows Disk Defragmenter is described as 'Disk Defragmenter is a computer program included in Microsoft Windows designed to increase access speed by rearranging files stored on a disk to occupy contiguous storage locations, a technique commonly known as defragmenting' and is a Defrag tool in the os & utilities category. There are more than 10 alternatives to Windows Disk Defragmenter for Windows and Mac. The best Windows Disk Defragmenter alternative is Defraggler, which is free. Other great apps like Windows Disk Defragmenter are Auslogics Disk Defrag, UltraDefrag, IObit Smart Defrag and WinExt Free.