{skjsn}

is a Python library that exports scikit-learn models to standard JSON. Compatible with Joblib and ONNX natively.

Installation

pip install skjson

Quick Start

Export directly from `model.fit()` using `skjson.save(model, 'model.json')`.

from sklearn.datasets import load_iris
from sklearn.ensemble import RandomForestClassifier
from sklearn.model_selection import train_test_split
import skjson

X, y = load_iris(return_X_y=True)
X_train, X_test, y_train, y_test = train_test_split(X, y, test_size=0.2, random_state=42)

clf = RandomForestClassifier(random_state=42).fit(X_train, y_train)

# Export the trained model to JSON
skjson.save(clf, 'demo.json')

Convert from Existing Models

Already saved your model? Convert from .joblib or .onnx directly to JSON without retraining.

import skjson

# Convert a joblib-serialized sklearn model to JSON
skjson.joblib_to_json("model.joblib")
# → Creates "model.json" in the same directory

Supported Scikit-Learn Models

skjson natively exports the following models without additional configuration:

Ensembles

  • • RandomForestClassifier
  • • RandomForestRegressor
  • • GradientBoostingClassifier

Linear Models

  • • LogisticRegression
  • • LinearRegression
  • • Ridge / Lasso

Preprocessing

  • • StandardScaler
  • • MinMaxScaler
  • • OneHotEncoder

Roadmap

  • Common sklearn models converted to JSON

    Completed

  • ONNX and joblib support

    Completed

  • pkl support

    Ongoing

  • sklearn pipeline support

    Ongoing

  • sklearn.neural_network model support

    Idle