Alternatives to UltraDefrag
A portable disk defragmenter for Windows with file placement, disk health monitoring and cleanup tools. The listings below can replace it for an important use case. Each note says what changes if you switch.
The original
UltraDefrag
A portable disk defragmenter for Windows with file placement, disk health monitoring and cleanup tools.
Replacements
Listings that take over the same core job as UltraDefrag.
O&O Defrag
A commercial Windows defragmenter that optimizes drives in the background to speed up startup.
O&O Defrag is also paid Windows software but focuses on automatic background optimization rather than manual control over individual files and folders, and has no portable edition mentioned.
Wise Disk Cleaner
A free Windows tool that removes junk files, wipes browser traces and defragments disks.
Wise Disk Cleaner is free and includes a built-in disk defragmenter alongside junk and browser trace cleanup, but offers no file placement control or disk health monitoring.
Similar software
Related functionality, not a direct replacement.
Microsoft PC Manager
Microsoft's free Windows app for cleaning up storage, managing pop-ups and running quick system checkups.
CrystalDiskInfo
Reads the health data your drives already record and tells you plainly whether one is dying.
TreeSize Free
Shows which folders are eating a Windows drive, ranked largest first, without a scan that takes all afternoon.
WinDirStat
Draws your whole drive as a treemap, so a single 40 GB file is a huge rectangle you cannot miss.
HDDScan
A free Windows utility for testing hard drives and SSDs, reading SMART data and running surface tests.
