WinContig is an easy-to-use stand-alone defragmentation tool that doesn't create any installation directories or Registry entries on your computer. Its purpose is to quick defragment files without the need to defragment the whole disk. WinContig supports FAT32 and NTFS file systems and it works with Hard Disks and SSDs.

Most defragmentation programs perform a general defragmentation of an entire partition. In a real-life scenario, you often want to defragment a single file or a directory, for example to improve the loading speed of a program file, or to reduce the loading time of a certain disk intensive application like a game.

WinContig has been designed specifically to meet the needs of users who focus mainly on files and folders rather than an entire disk.

Its ability to filter files by several criteria combined with its ability to be controlled via command-line switches, make WinContig the perfect tool to defragment particular files that are frequently used and continuously becoming fragmented.



WinContig is a standalone executable, and it doesn't require any installation process or additional DLLs. All the files required to run WinContig, including any settings, reside in a single folder.

Very fast and Reliable

Defragmentation and analysis processes are based on kernel-mode interface library functions. Thus, performing defragmentation process is safe and there is no risk of losing data.

Defragment single files

Specifically designed to defragment single files or entire folders without the need to defragment the whole disk.

Customizable interface

Make WinContig function in a way that fits your needs.

Check disk integrity

Check disks for file system errors and get some useful information out of them.

Support for command-line switches

WinContig accepts a number of optional command-line switches that you can use to control how the program operates.

Remove unnecessary files

Delete temporary files before defragmentation.


WinContig is available in more than 25 languages thanks to the volunteers' contributions from all over the world.


WinContig is released as freeware and you can use it on as many Windows computers as desired for both personal and commercial use.

Integration with File Explorer

WinContig optionally allows you to analyze and/or defragment files and folders directly from the context menu of File Explorer.

What's New

  • Added the Ukrainian language module.
  • Some minor graphic improvements.
  • WinContig may fail to start when launched from a mapped network drive. Fixed. Many thanks to Robert Morris who pointed it out.
  • When adding exceptions to the filter by the size of fragments and the number of fragments, excluded files are still processed. Fixed. Many thanks to Aleksey who pointed it out.
  • Running WinContig from the context menu of File Explorer may stop on a second attempt on some Windows 10 environments. Fixed. Many thanks to Pons B. who pointed it out.
  • Added the /RECURSE command-line switch, which enables you to search for every occurrence of the specified file name within the specified folder and all subfolders.