Extract text from Neural network packages (NNP)
To convert NNP packages to another format, you need Sony Neural Network Libraries or other Developer software.
To convert other file formats to the "Neural Network Model File" file type, you need software like Sony Neural Network Libraries or a similar tool.
The .NNP file is primarily a Neural Network Package used by Sony Neural Network Libraries (NNabla) and the visual Neural Network Console. Under the hood, it is essentially a standard ZIP archive containing the vital components of a trained machine learning model. Inside the archive, it typically holds the network architecture in a .NNTXT file, trained parameters (weights and biases) in an H5 file, and other necessary training metadata. A secondary, much rarer use case is the ANNI Neural Network Portfolio File developed by Neural Science.
The main disadvantage of the .NNP format is its heavy reliance on the Sony ecosystem. While excellent for deployment on specific proprietary hardware, it is largely incompatible out-of-the-box with mainstream open-source AI frameworks like TensorFlow or PyTorch. This restricts your ability to share models with external researchers or integrate them into broader production pipelines. Testing or executing models stored as .NNP usually demands specific runtime installations, creating unnecessary friction.
When converting an .NNP file, developers typically aim for interoperability. The best target formats include ONNX (Open Neural Network Exchange), which serves as a universal standard across diverse AI frameworks, or extracting the native HDF5 (H5) files for manual weight manipulation. Because the .NNP container is natively a ZIP file, renaming the extension to ZIP allows you to extract its raw contents effortlessly.
Because .NNP is a framework-specific package, generic conversion tools fail to parse its complex network graphs. Often, only the original Neural Network Libraries ecosystem can properly read or export the data into standard AI formats. Because our analysis detects the standard underlying ZIP format, viewing the internal files or converting it into an uncompressed archive is highly possible.
Convert.Guru analyzes your NNP file, detects the exact format, and lets you read the text inside.
Users also converted NNB, NNI and STKX files.
If you want to convert NNP file to , you can use Sony Neural Network Libraries or similar software from the "Machine Learning Model Package" category. In the File menu, look for Save As… or Export….
To convert files to NNP, try Sony Neural Network Libraries or another comparable tool in the "Machine Learning Model Package" category.
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