Frequently I am in need to update a folder taking files from many different folders (and finally updating them too).
I looked on the web but I didn’t find anything that could easily do this dirty work.  So I wrote this small program.

It is a file synchronizer with unique features like handling more than 2 folders with just a few clicks.  It’s very simple, but I strongly recommend reading the included documentation.

It has the following key features:

  • multiple folder handling (2 or more).
  • the folder analysis can be modified to your needs.
  • the ability to save and load your settings in project files.
  • the ability to save in a separate folder the source changes (Export Delta).
  • multithreaded.
  • optimal file multithreaded copy engine (by using temporary files and/or by overwriting files).
  • configurable.  You can easily integrate it with a text editor, a hex editor, and a diff viewer.
  • minimal registry usage (only for Explorer integration).
  • small, fast, and clean.
  • HTML Help included.
  • for advanced users only!!!

The program is freeware and it is licensed under a Creative Commons Attribution-NoDerivs 4.0 Unported License. Creative Common license


If you are curious and want to see if this program may fit your needs, get a look at this small quick tour.

Minimal requirements:

Intel/AMD processor, Windows 10


v6.6.752.0 – 64 bits
updated 21/04/2023– Version HistoryNOTE: in exceptional cases, where the setup file cannot download the needed package from MS servers, go to this local support page.

Download from: (1.41 MB)

this site:
Horodruin setup package (102705 downloads)

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Windows 11 Downloads [4/5 stars]

v6.6.752.0 – 32 bits portable
updated 21/04/2023

Download from: (2.13 MB)

this site:
Horodruin portable package (31407 downloads)

My PGP Public Key (33748 downloads)  to verify the setup kit (if you wish).


  • Horodruin v6.04 main window on Windows 11
    Horodruin v6.04 main window on Windows 11