The BEST File Manager for Windows

Works with and greatly enhances:

Windows 11, 10

Windows 8, 7, Vista, XP

Servers 2003 and later

Starting at just $50 for home use and $69 for a business license (and a business two-pack for just $99!)

What's New / What's Up

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Version 4: the future

Major new tools, significant upgrades to current components and faster folder listings.

  • Find and rename problem files: bad paths, illegal characters, Linux & iOS (Mac) characters.
  • Check files and folders for compliance with different file systems e.g., NTFS, Fat-16, Fat-32, eFat, CDs, iOS, Linux and custom.
    Know if the files are right before you copy.
  • Delete files no matter their length or how they are named.
  • Powerful renaming with RegEx e.g. change 'Romeo Smith' into 'Smith, Romeo' and much more.
  • Lightening fast directory listing no matter how large the folder.
  • Detailed reports for copy errors.
  • Variable text size for views and dialogs.
  • and many more improvements and fixes..


See the V4 preview here.

Update May 2017

A May 2017 Microsft security update for Windows 10 conflicted with a major routine in FileBoss resulting in FileBoss not starting on some Windows 10 systems.

Versions V3.101 and later, fix the problem. You can read more about this at the page
Windows Creators Conflict.


Rename Files
to True DOS 8.3 Format

Whether you want to add sequential numbers, change case, change extensions, remove or convert spaces, add folder names or each file's time to its name FileBoss has a quick and easy routine for doing so. And whether you are renaming files just a few at a time or batch rename by the thousands the routines work exactly the same.

How to convert filenames to DOS 8.3 format

Unlike many programs that attempt to rename files to the DOS 8.3 format, FileBoss makes the long file the same as the 8.3 format that Windows already maintains. This ensures compatibility with existing programs. Due to historical, internal weirdness of Windows (sorry, there is no other way to describe it) to rename a file to be the same as Windows' native 8.3 format requires extra work. Most other programs simply pick a new 8.3 name to use rather than using true names.

1) Select the files you want to rename by changing to DOS 8.3 Format

In the following example we have selected a series of folders that we want to convert to the DOS 8.3 format

2) Select Actions > Rename... from the main menu


Rename menu item on the Actions menu

3) Select the Change to 8.3 Names tab

The display below shows all the tab. It is important to remember that when the OK button is pressed only the settings in the current tab - in this case the Transform tab - will be used to rename the files.

  1. Click on the Change to 8.3 Name tab it is not already selected.
  2. There are no options available for this renaming function.
  3. Check the sample renamed file. This sample is always available for all the options giving you an idea of how the options will affect the filenames.

4) Confirm the renamed files

After pressing the OK button in the above step, FileBoss will find the first file to be renamed and display a confirmation dialog similar to the one below.

You can continue to rename or skip each file individually or at any time you can Rename All the rest of the files or Skip Rest thus ending the renaming.

Note that you can edit the new name anyway you like and then press the Rename button giving you total control over how the file is named.

5) See the results

When FileBoss has finished renaming the files the new names will appear immediately in the Contents window.