Click the "Select File" button above, and choose your NPZ file.
You’ll see a preview, if available.
Click the "Convert file to..." button to extract text information.
Convert NPZ to another file type
To convert NPZ NumPy archives to another format, you need NumPy or other Data software.
Convert a file to NPZ
To convert other file formats to the "Python NumPy Archive" file type, you need software like NumPy or a similar tool.
About NPZ files
An .npz file is a compressed archive format containing multiple npy files, which store multi-dimensional array data. These files are typically used in machine learning, scientific computing, and data science to store model weights, complex datasets, and large mathematical matrices. You must normally use the NumPy library within the Python programming language to open and manage these files. You can read more about the ecosystem on Wikipedia: NumPy. Users frequently need to convert .npz files because they are highly specialized and essentially opaque to non-programmers. You cannot open an .npz file natively in a web browser, a standard text editor, or typical spreadsheet software like Microsoft Excel. The format requires a dedicated Python environment to decode the serialized binary array data. Converting the internal arrays to structured formats like CSV, JSON, or TXT is highly recommended to make the data universally readable, though converting to flat files means you will lose the efficient binary compression and complex multi-dimensional structures native to NumPy arrays. Because this is a proprietary, closed data structure heavily tied to Python, standard online converters usually fail to process it. They lack the specific Python runtime required to deserialize the array structures. If our analysis detects supported embedded text or underlying array shapes, viewing or conversion to common data formats may still be possible.
Convert.Guru analyzes your NPZ file, detects the exact format, and lets you read the text inside.
If you want to convert NPZ file to CSV, NPY, IMAGE, MAT, DICT, TXT, PKL or HDF5, you can use NumPy or similar software from the "Compressed Array Data Storage" category. In the File menu, look for Save As… or Export….
To convert files to NPZ, try NumPy or another comparable tool in the "Compressed Array Data Storage" category.
The NPZ 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 NPZ converter.