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NSZ NSP
File conversion

Convert NSZ to NSP

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Is it possible to convert NSZ to NSP?
Yes - NSZ converts to NSP.

The primary operation: decompress the NSZ back to its original NSP. Run 'nsz -D game.nsz' (NSZ tool) or use NSC_BUILDER. It's lossless - you get the exact original NSP back. Requires your console keys (prod.keys) for content that must be re-handled.

Also to NSP: XCI · Z64 · N64

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Tested on macOS, Windows & Linux
Last verified Oct 2026

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How to convert NSZ to NSP

Converting a .NSZ file to .NSP lets you open the content in software that prefers the .NSP format, though some details may change compared with the original. We are still putting together the list of programs that handle .NSZ files.

A full step-by-step guide for this conversion is on the way; the information above is drawn straight from our database.

About these formats

.NSZ Compressed Nintendo Switch Package

An NSZ file is a Nintendo Switch game package (NSP) compressed losslessly with Zstandard, typically 40-80% smaller than the original. Modern Ryujinx-family emulators open NSZ files…

Open .NSZ details →
.NSP NSP File

A .NSP file is a data file used by specific software.

Open .NSP details →