All about W3M Files

The W3M file type is primarily associated with Warcraft III World Editor.

W3MFile Extension W3M
 File extension: W3M
File type:  Map file

What is a W3M file?

W3M files mostly belong to Warcraft III World Editor. W3M files are map containers used in Warcraft III: Reign of Chaos.
  • They hold data for terrain layout, object placement, triggers, and unit positions.
  • They are created and edited with the Warcraft III World Editor.
  • The file structure is tailored for the game engine and is not meant for general text editing.
    • FilExt.com tip: Open these files using the World Editor that comes with the game. For more details on the tool and game, visit Blizzard.

    How to open a W3M file

    You need a suitable software like Warcraft III World Editor to open a W3M file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your W3M file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a W3M file directly in the browser:. Just drag the file onto this browser window and drop it.

    Online W3M Text Viewer

    Choose your .w3m file to analyze
    ✈

    Read our privacy guarantee in Filext’s terms and privacy policy

    Please allow ads on our site

    This helps us keep our servers running. Then re-upload your file to view it.

    Click here to see how to disable the ad blocker for filext.com

    Programs that open and convert W3M files:

    1. Warcraft III World Editor
      See the previous paragraphs to learn more about the main application. W3M files are often referred to as Warcraft III World Editor games because this type of file is primarily created or used by this software.
    2. Warcraft III (Map File) by Blizzard Entertainment
      Also used by other Blizzard Entertainment games. The identifying characters used for this association are - Hex: 48 4D 33 57, ASCII: HM3W. Program ID is WorldEdit.Scenario

    Technical Data for W3M File Extension

    File classification:
    Game
    Identifier:
    Hex: 48 4D 33 57, ASCII: HM3W (provided by TrID database)
    Program ID:
    WorldEdit.Scenario
    Related files:
    w3x, w3u, w3t, w3a, w3h, blp, mpq, w3n, exe, zip, pud, w3g, w3z

    The following listing is compiled from the database produced by the 'Associate This!' program, selected data from the main FILExt database and file extension information submitted by users.

    ProgramID: WorldEdit.Scenario, FileType: Warcraft III Scenario File, AppName: World Editor
    EXEFile: World Editor.exe
    ProgramID: WorldEdit.Scenario
    EXEFile: %ProgramFiles%\Warcraft III\World Editor.exe -loadfile
    ProgramID: WorldEdit.Scenario
    EXEFile: %ProgramFiles%\Warcraft III\World Editor.exe -loadfile %1
    ProgramID: WorldEdit.Scenario
    EXEFile: C:\Games\Warcraft III\World Editor.exe -loadfile %1
    ProgramID: WorldEdit.Scenario
    EXEFile: d:\Games\Warcraft III\World Editor.exe -loadfile %1
    ProgramID: WorldEdit.Scenario
    EXEFile: D:\igre\Warcraft III\World Editor.exe -loadfile %1
    ProgramID: WorldEdit.Scenario
    EXEFile: D:\Warcraft III\World Editor.exe -loadfile %1
    ProgramID: WorldEdit.Scenario
    EXEFile: %ProgramFiles%\Warcraft 3\World Editor.exe -loadfile %1
    ProgramID: WorldEdit.Scenario
    EXEFile: C:\Warcraft III\World Editor.exe -loadfile %1
    ProgramID: WorldEdit.Scenario
    EXEFile: E:\Warcraft III - Frozen Throne\World Editor.exe -loadfile %1
    ProgramID: WorldEdit.Scenario
    EXEFile: %ProgramFiles%\Warcraft III_4\World Editor.exe -loadfile
    ProgramID: WorldEdit.Scenario
    EXEFile: %ProgramFiles%\Warcraft III2\World Editor.exe -loadfile
    ProgramID: WorldEdit.Scenario
    EXEFile: %ProgramFiles%\Warcraft III\World Editor.exe -loadfile
    Show all 13 listingsTo Top

    a w3m Map file is a special file format and should only be edited and saved with the appropriate software.

    How to solve problems with W3M files

    • Associate the W3M file extension with the correct application.
    • Update your software that should actually open map files. Because only the current version supports the latest W3M file format. Search, therefore, e.g. on the manufacturer website after an available Warcraft III World Editor update.
    • To make sure that your W3M file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
    • Click here to open your .W3M file online - secure, fast, and no downloads needed.
    Drop here
    View another file
    W3M file viewer W3M file description