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Nintendo 3DS "Custom Firmware"

What it is

Luma3DS is a program patching and reimplementing significant parts of the software running on all models of the Nintendo 3DS family of consoles.

It aims at greatly improving the user experience and at supporting the 3DS far beyond its end-of-life. Features include:

  • First class support of 3DSX homebrew
  • An overlay menu called "Rosalina" (triggerable by L+Down+Select by default), allowing amongst many thing to take screenshots while in-game
  • Removal of restrictions such as the region lock
  • Per-game language settings, asset content path redirection (LayeredFS), game plugins...
  • A fully-fledged GDB stub allowing to debug software (homebrew and system software alike)
  • ... and much more!

Luma3DS requires a full-system persisent exploit such as boot9strap to run.


To build Luma3DS, the following is needed:

The produced boot.firm is meant to be copied to the root of your SD card for usage with Boot9Strap.

Setup / Usage / Features

See (needs rework)


See (needs rework)


This software is licensed under the terms of the GPLv3. You can find a copy of the license in the LICENSE.txt file.

Files in the GDB stub are instead triple-licensed as MIT or "GPLv2 or any later version", in which case it's specified in the file header.

By contributing to this repository, you agree to license your changes to the project's owners.