---
title: data.split API Reference
description: Learn how to split datasets into train, validation, and test subsets using Ultralytics utilities for efficient data preparation.
keywords: dataset splitting, autosplit dataset, training dataset preparation, validation set creation, Ultralytics data tools
---

# Reference for `ultralytics/data/split.py`

!!! success "Improvements"

    This page is sourced from [https://github.com/ultralytics/ultralytics/blob/main/ultralytics/data/split.py](https://github.com/ultralytics/ultralytics/blob/main/ultralytics/data/split.py). Have an improvement or example to add? Open a [Pull Request](https://docs.ultralytics.com/help/contributing) — thank you! 🙏

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## ::: ultralytics.data.split.split_classify_dataset

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## ::: ultralytics.data.split.autosplit

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