The File Extensions Database

.3DSX File Extension

  • Category: Game Files

What is an .3DSX file?

.3DSX is Homebrew Launcher File

A 3DSX file is a homebrew launcher file used by 3DS software exploits such as ninjhax, ironhax, or tubehax to run homebrew. It contains executable code that is run to launch homebrew applications, which are unofficial software created by amateur developers for closed gaming systems.

On a 3DS, homebrew enables you to customize the home menu and play old SNES games and out-of-region games. The 3DSX format is designed to allow other homebrew to be launched when it is running. It also offers compatibility with future homebrew exploits as each section of the format can be independently relocated if needed.

3DSX files are not meant for use on computers as they are used on 3DS devices to run homebrew. However, you can place the 3DSX file on an SD card inserted into your Windows computer using File Explorer or Mac using Finder. The 3DSX file must be placed in the "3ds" folder in the root of an SD card in a 3DS. The 3ds folder also contains all the homebrew applications you can install to your system.

Common 3DSX Filenames

boot.3dsx - The name of the homebrew launcher file, which is located in the "3ds" folder of an SD card of a 3DS that runs homebrew.

Programs that open Homebrew Launcher File
Microsoft File Explorer
Apple Finder

How to solve problems with 3DSX files

  • Associate the 3DSX file extension with the correct application. On :
    Windows: Right click on any 3DSX file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *.3DSX files". Mac: Right click (or Ctrl-click) the 3DSX file, then click "Open with" > "Other...". Then choose another program and check the "Always Open With" box. Linux: Right click on the file, and select "Open with" and choose another program. iPhone: Tap the file. If you do not see an app to open the file, then tap Share "Share" and choose an app. Alternatively, save the file. Then open the Files app Files app. There long-press on the file, then release your finger. You will see a black menu bar. Then tap "Share" and select an app. Android: Tap the Settings icon on your smartphone, then tap on the Apps section. There tap the Options icon in the top right-hand corner of the screen to change the default apps.
  • Update your software that should actually open .3DSX is Homebrew Launcher File. Because only the current version supports the latest 3DSX file format. Search, therefore, e.g. on the N/A manufacturer website after an available .3DSX is Homebrew Launcher File update.
  • To make sure that your 3DSX file is not corrupted or virus-infected, get the file again and scan it with antivirus software.