Defraggler
Defragmentation utility for Windows
Defraggler is a formerly-supported freeware defragmentation utility developed by Piriform Software, which can defragment individual files or groups of files on computer memory systems. Defraggler runs on Microsoft Windows; it has support for all versions since Windows XP. It includes support for both IA-32 and x64 versions of these operating systems. As of August 2026, Defraggler is no longer hosted on Piriform's website.
01Overview
Defraggler can defragment individual files, groups of files (in a folder) or an entire disk partition, either by the user's command or automatically on a schedule. It supports FAT32, NTFS, and exFAT. It can also be installed as a portable application on a USB flash drive. Defragmentation of RAID disks is also supported, although no details are supplied.
Defraggler was given a 5/5 star rating from Softpedia. In Lifehacker's Hive Five for Best Disk Defragmenter, Defraggler received first place.
Sources and credits
This article is adapted from the Wikipedia article “Defraggler”, written by its contributors and licensed under CC BY-SA 4.0. Fathomly has changed the layout, removed citation markers, navigation and maintenance notices, and adjusted punctuation. This adapted version is shared under the same license. For references, see the original article.
Images, from Wikimedia Commons:
- Defraggler icon.png by Unknown author, Fair use
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