Defraggler is a free defragmentation utility from Piriform, the same company behind CCleaner. Where Windows' built-in Optimize Drives tool only works on whole drives, Defraggler lets you target a single large file or folder instead of waiting on an entire disk, and shows exactly which files are fragmented through a color-coded block map. It supports both traditional hard drives and, with more limited benefit, SSDs.
Defraggler vs Windows' Built-In Optimize Drives Tool
Windows already includes a scheduled defragmenter under Optimize Drives, so for most everyday users it is enough. Defraggler's advantage is control: it can defragment a single file instead of an entire disk, which is useful right before working with one large video or database file, and its drive map gives a visual, block-by-block view of fragmentation that Windows' tool does not show. It also runs on older Windows versions and offers a portable build that needs no installation.
Defraggler Features
- Whole-Drive Defrag — reorganize fragmented files across an entire hard drive.
- Single File/Folder Defrag — target just one large file or folder instead of the whole disk.
- Visual Drive Map — a color-coded block view showing which parts of the drive are fragmented.
- Quick or Full Defrag Modes — choose a faster pass or a more thorough full analysis and defrag.
- Portable Version — run Defraggler from a USB drive without installing it.
- FAT32 and NTFS Support — works across the common Windows file systems.
- File List Sorting — sort files by fragmentation level to see what needs attention most.
How to Install Defraggler on Windows
- Open the official download page using the button on this page, which links to Piriform's CCleaner site.
- Download the free version and skip any trial-of-Pro prompts if you only want the free edition.
- Run the installer and follow the setup wizard, declining any bundled offers.
- Launch Defraggler and select a drive, or switch to the file list to pick a single file or folder.
- Click Defrag and let the visual drive map show progress until it completes.
Is Defraggler really free?
Freemium. Defraggler's core defragmentation features are free to use indefinitely; a paid Professional edition adds scheduling, priority support and automatic background defragmentation.
How to download Defraggler safely
Use the request button on this page and we will email you the current link for ccleaner.com/defraggler — the publisher's own website — so you receive the authentic build. We do not host, mirror, patch or repackage this software in any way.
Avoid third-party "download manager" sites offering Defraggler. They commonly wrap the genuine installer in their own bundler, which is how adware and browser hijackers get onto a machine that the user believed was clean.
Frequently asked questions
Is Defraggler free?
Yes. The standard edition of Defraggler is free for personal use; a paid Professional version adds scheduling and automation features.
Can Defraggler defrag a single file?
Yes, that is one of its standout features — you can target one large file or folder instead of defragmenting the whole drive.
Should I run Defraggler on an SSD?
Generally no. SSDs do not benefit from traditional defragmentation the way hard drives do, and excessive writes can slightly shorten SSD lifespan; Defraggler is best used on mechanical hard drives.
Does Defraggler work on Windows 11?
Yes, Defraggler is compatible with modern Windows versions including Windows 11.
Is there a portable version of Defraggler?
Yes, Piriform offers a portable build that runs from a USB drive without installation.
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