Chances are that if you are familiar with the Nintendo Switch Modding Scene. You have come across games that are in .xci or .nsz format and know that to transfer them to your console you need to convert them to .nsp . This is where SAK aka Swiss Army Knife comes in. First off head over to GitHub to download this amazing tool.
After downloading and extracting SAK. You need to get your hands on a keys.dat file. Use google and find some keys and create your own keys.dat in notepad++ . Here’s an example of what your keys file will look like.
Then drag your keys.dat file into the bin folder. Now run SAK and simply choose the function you would like performed.