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H3M file extension

The table below provides useful information about the .h3m file extension. It answers questions such as:

  • What is the .h3m file?
  • What program do I need to open a .h3m file?
  • How can the .h3m file be opened, edited or printed?
  • How can I convert .h3m files to another format?

We hope you find this page helpful and a valuable resource!

1 extension(s) and 0 alias(es) found in database

✅ Heroes of Might and Magic 3 Map Data

H3M file is a Heroes of Might and Magic 3 Map Data. Heroes of Might and Magic 3: The Restoration of Erathia is a turn-based strategy game released for Microsoft Windows.
H3M format description not yet available
Category: Game Data files
Mime-type: application/octet-stream
Magic number: -
Magic string: -
Sample: -
H3M aliases:
H3M related links:
H3M related extensions:

Other types of files may also use the .h3m file extension.

🚫 The .h3m file extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:

g3m, hm, hm3, hrm, n3m

Is it possible that the filename extension is misspelled?

We found the following similar file extensions in our database:

Casio Prizm Main Memory Data
WinHelp Context ID
Help and Manual 3 Project
Polar Heart Rate Monitor Data
Atari ST HighresMedium Image
Nokia 3D WebGL Map

🔴 Can't open a .h3m file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:

Windows cannot open this file:


To open this file, Windows needs to know what program you want to use to open it...

If you don't know how to set the .h3m file association, check the FAQ.

🔴 Can I change the extension of files?

Changing the filename extension of a file is not a good idea. When you change a file's extension, you change the way programs on your computer read the file. The problem is, changing the file extension does not change the file format.

If you have helpful information about the .h3m file extension, write to us!

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Browser: Abbreviation Application Archive Audio Configuration Data Development Disk Image Document Ebook Font Game Data GIS Graphic Malware Multimedia Other Project Scam Unknown Video
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