Click the "Select File" button above, and choose your NSZ file.
You’ll see a preview, if available.
Click the "Convert file to..." button to extract text information.
Convert NSZ to another file type
To convert NSZ Switch games to another format, you need Tinfoil or other Game software.
Convert a file to NSZ
To convert other file formats to the "Compressed Switch ROM" file type, you need software like Tinfoil or a similar tool.
About NSZ files
A .NSZ file is a compressed Nintendo Switch game ROM. It is fundamentally a compressed version of an NSP (Nintendo Submission Package) file, utilizing Zstandard (Zstd) compression to significantly reduce file sizes without losing data. Users typically interact with these files using homebrew installers like Tinfoil, or PC-based tools such as SAK (Switch Army Knife) and NSC_Builder. Switch emulators like Ryujinx or Yuzu also support loading them directly or require decompression first. The main disadvantage of the .NSZ format is its lack of universal PC compatibility. Standard archive managers like WinRAR or 7-Zip cannot natively extract the internal NCA game partitions. Furthermore, some older custom firmwares or emulators require uncompressed files, forcing users to decompress them back to NSP before use. The most common conversion target is NSP. Converting .NSZ to NSP restores the original game package structure without data loss. Advanced users might also convert it to XCI for use in specific emulator setups. This is a specialized, proprietary container designed specifically for the Nintendo Switch ecosystem. Standard online converters completely fail to process it because they lack the specific cryptographic keys required to parse Nintendo's proprietary file structures. While full online conversion might be blocked by console encryption, our analysis can still identify the file format, inspect the file, and show internal metadata or embedded formats. Secondary, much rarer uses for this extension include game archives for Rumble Fighter and particle size data files for Malvern Panalytical Zetasizer software.
Convert.Guru analyzes your NSZ file, detects the exact format, and lets you read the text inside.
If you want to convert NSZ file to NSP, EXE, ISO, BIN, CUE, PAK, WAD, PK3, PK4, BSP, MAP or SAV, you can use Tinfoil or similar software from the "Compressed Game ROM" category. In the File menu, look for Save As… or Export….
To convert MOD, BIN, CFG, SCX, DAT, MPQ, LOG, CUE, INI, EXE, SCM or ISO files to NSZ, try Tinfoil or another comparable tool in the "Compressed Game ROM" category.
The NSZ Converter Story
The history of Convert.Guru began over 25 years ago in California with Tom Simondi’s file-format database. A former contributor to Space Shuttle development and a software pioneer of the 1980s, Simondi established a trusted resource for file type analysis that was even referenced by Microsoft Windows XP. Today, we use modern technology to process and convert thousands of file formats while continually improving our NSZ converter.