Because most commercial 3DS games are encrypted to prevent unauthorized use, Citra cannot run them directly. The emulator requires a set of cryptographic keys to decrypt the ROM data in real time. The aes_keys.txt file contains these keys, which function like a master password that allows Citra to play games that have the .3ds , .cci , or .cia file extensions.
Now that you have both your key file and your portable setup, it is time to bring them together. The single most important thing to remember is that the text file .
: You can now launch Citra by double-clicking citra-qt.exe . It will now read and write all its data exclusively from the user folder in its own directory. Congratulations, your portable version is ready!
If sysdata does not exist, create a folder named sysdata inside the user folder. 3. Add aes_keys.txt aeskeystxt citra portable
Create a brand-new folder where you want the emulator to live (e.g., C:\Games\Citra Portable\ ). Extract the downloaded Citra zip archive into this folder.
: In Portable mode, it must be in the folder with the .exe , not in your Windows %AppData% profile. Alternative: Decrypted ROMs
Once the file is correctly placed, you can launch citra-qt.exe from your portable directory and load any of your legally dumped encrypted ROMs. Because most commercial 3DS games are encrypted to
In a standard installation, keys are placed in C:\Users\[Username]\AppData\Roaming\Citra\sys\ .
You must own a physical Nintendo 3DS console to legally dump your own keys. Distributing copyrighted keys is illegal. This guide explains the process, not where to find pre-made files.
slot0x2CKeyX = XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX slot0x25KeyX = XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX Use code with caution. Now that you have both your key file
Ensure the sysdata folder sits inside the user folder, not directly alongside citra-qt.exe .
As an alternative, you can create the text file from scratch using a text editor like Notepad. This method is useful if you only have the key information itself but cannot run the script. The file's content must adhere to a specific format.
When you legally dump a game cartridges you own (which is the only method we endorse), the resulting file is often an encrypted .3ds or .CCI file. By itself, Citra cannot decrypt and run these protected games.
: Many users seek these keys online through community repositories or forums like the 3DS Roms Reddit , though sharing them directly is often prohibited due to copyright. Troubleshooting Common Issues