.W3M File

The w3m file extension is used for maps in Warcraft III computer game.

The w3m file is a Warcraft III Map file (AKA Warcraft III Scenario in the World Editor).

It's just a MPQ (using a "new" compression format) with a 512bytes header. Sometimes, for official W3M files, it uses a footer of 260 bytes for authentication purposes.

Files with w3m file extension can be generally found as map files for Warcraft 3 computer games.

How to open:

Use Warcraft Map Editor to open *.w3m files.

How to convert:

Probably cannot be converted to anything else.