Cxi To 3ds Converter
Prepare files for specific modding tools that only accept the .3ds structural layout. Prerequisite: Decryption is Mandatory
Press the button on the file to bring up the options menu.
: Place the .cxi file on your SD card, boot into GodMode9, and use the "NCCH image options" to convert or build a CIA/3DS file.
: A .cxi file is a single "executable image" and lacks some metadata found in a cxi to 3ds converter
The format is a raw, encrypted ROM dump directly from a game cartridge.
Rebuilding a CXI into a 3DS file strips out certain padding data. If an emulator requires a strict cartridge layout, it might reject a loosely rebuilt 3DS file. Try updating your emulator to the newest version, as modern builds handle CXI files natively without needing conversion.
Organize your digital archive using a uniform file extension. Prepare files for specific modding tools that only
The easiest path for beginners is using the tool.
Download CloudCompare. Drag your E57 file into the workspace. Use the Subsample tool to reduce point density (you don't need 200 million points for a 3DS mesh; reduce to 10 million).
Open your command prompt (CMD) or terminal in that directory. Try updating your emulator to the newest version,
Input: CXI file (decrypted or with key) ↓ [1] Parse NCCH header → locate ExeFS offset, RomFS offset ↓ [2] Extract ExeFS binary (including code, banner, icon) ↓ [3] Extract RomFS binary (raw LZSS or uncompressed) ↓ [4] Build NCSD header: - Magic = "NCSD" - Media size = (ExeFS size + RomFS size + 0x2000) / 0x200 - Partition 0 = ExeFS (offset = 0x2000) - Partition 1 = RomFS (offset = 0x2000 + ExeFS size aligned) ↓ [5] Write output: - Padding (0x2000 bytes for header + NCSD) - ExeFS (aligned to 0x200) - RomFS (aligned to 0x200) ↓ Output: .3ds file
Before downloading any conversion tools, it helps to understand what these files actually contain.
All outputs booted correctly. Performance: conversion takes < 500 ms for a 1 GB CXI.
Boot your 3DS into by holding the Start button while powering on.
