BMD File Extension

BMD file icon

MU Online Game Data Format

What is a BMD file?

MU Online Game Data Format, identified by the BMD extension, is a Game Files type and includes 1265 files.

With the creation of the MU Online Game Data Format (BMD), Webzen introduced file format along with programs built for their use.

BMD files are supported by Windows. If you want to view a BMD file, you can rely on MKDS Course Modifier.

Programs that support BMD files

How to open a BMD file?

The most common reason why a BMD file cannot be opened is the absence of required software. To fix this, select a compatible program from the list. Then visit the official developer website via the provided link, download the program, and install it on your system.

MKDS Course Modifier has gained great popularity and is often seen as the leading software for handling BMD files. To get the latest version of MKDS Course Modifier, open the website where a universal installer for all operating systems is available.

Once setup is done, your operating system should assign MKDS Course Modifier as the default app for BMD files.

Make MKDS Course Modifier the default BMD viewer

Changing the default program in Windows

  1. Start by right-clicking on your BMD file and selecting the "Open With" option. From there, click "Choose another app" to continue;
  2. Inside the popup window, scroll through the list of applications and specifically choose MKDS Course Modifier as the application to associate with your BMD file;
  3. Check the "Always use this app" checkbox and click "OK".

Change the default app to open files on Mac

  1. Right click or use Control + Left Click on the desired BMD file to access a dropdown menu of actions;
  2. Select "Open in application" and click "Other";
  3. Scroll down to the bottom of the window, where you will find the "Enable" menu. Default, "Recommended Programs" will be selected;
  4. In this menu, choose "All Programs" and navigate to MKDS Course Modifier. Check the box next to "Always open in app" to make it the default program.

Finding answers to BMD file problems

If you encounter issues with BMD files, don’t worry—most can be fixed with minor software adjustments. Refer to the troubleshooting tips below.

What are the signs that my BMD file is damaged?

Corrupted BMD game files may have one or more of the following symptoms:

  • Opening or processing the file in MKDS Course Modifier or other programs causes instability or crashes in the program;
  • The file shows errors when trying to open it or does not open completely;
  • Unexpected expansion of the total size of the BMD file;
  • Working with the file triggers the display of error messages;

Why does MKDS Course Modifier quit or crash unexpectedly?

MKDS Course Modifier crashes can be attributed to outdated software. Make sure you have installed the latest updates for developer products.

A computer restart is often the key to solving numerous common problems. That’s why, it is recommended to restart the computer before making any changes to the software settings.

What methods can be used to repair a damaged BMD file?

Use a recovery program to open the damaged BMD file and navigate to the "Repair" menu item. Wait for the recovery process to finish, as it will automatically repair damaged game files.