Add file extension

File extension H3M

The most common cause of problems with opening the H3M file is simply the lack of appropriate applications installed on your computer. In this case, it is sufficient to find, download and install an application that supports the H3M file format - this type of programs are available below.

File type Heroes Of Might And Magic 3 Map Format
Developer New World Computing



It should be noted that some coded data from files that your computer does not read can be sometimes previewed in a Notepad. This way, we will read passages of a text or numbers. It is worth checking if this method can also be applied to the H3M files.

What should be done when an application from the list has already been installed?

Often, an installed application should automatically link to a H3M file. If it did not happen, the H3M file can be linked with the newly installed application manually. Simply right-click on the H3M file, then from the available list select "Choose default program". Next, select "Browse" and find the application you selected. These changes have to be confirmed by pressing the "OK" button.

Programs that can open the H3M file

  • New World Computing Heroes of Might and Magic 3New World Computing Heroes of Might and Magic 3
  • Heroes 3 Map EditorHeroes 3 Map Editor
  • Heroes of Might & Magic III: The Restoration of ErathiaHeroes of Might & Magic III: The Restoration of Erathia
Mac OS
  • Heroes of Might and Magic 3Heroes of Might and Magic 3

Why can’t I open the H3M file?

However, problems with the H3M files can also have a different background. Sometimes even the software, installed on your computer, that supports the H3M files does not solve the problem. The reason for the fact that the H3M file can’t be opened and used can also be:

- an incorrect link to the H3M file in the registry entries
- corruption of a H3M file, that you want to open
- infection of a H3M file (viruses)
- insufficient computer hardware resources
- drivers out of date
- accidental deletion of the H3M file from the Windows registry
- incomplete installation of the program that supports a H3M file?

Solving these problems should allow the free opening and working with the H3M files. If the computer still has problems with the files, use the services of an expert who will diagnose a specific cause.

My computer does not show file extensions, what should I do?

In the standard Windows settings, a computer user cannot see the H3M file extension. However, you can successfully change this in the settings. Just go to "Control Panel" and select "Appearance and Personalization". Then, go to the "Folder Options" and open the "View" tab. On the "View" tab, you will find "Hide extensions for known file types" – you should mark this option and confirm by pressing "OK". At this point, the extension of all files, including the H3M files should be displayed after the file name.