---
id: nltk
version: "3.10.3"
license: Apache License, Version 2.0
license_treatment: permissive
maintenance: active
---

# nltk — Natural Language Toolkit

License: permissive · Maintenance: active · Popularity: top 1,000 on PyPI

## Install

pip install nltk
uv add nltk
poetry add nltk

## Description

# Natural Language Toolkit (NLTK)
[![PyPI](https://img.shields.io/pypi/v/nltk.svg)](https://pypi.python.org/pypi/nltk)
![CI](https://github.com/nltk/nltk/actions/workflows/ci.yml/badge.svg?branch=develop)

NLTK -- the Natural Language Toolkit -- is a suite of open source Python
modules, data sets, and tutorials supporting research and development in Natural
Language Processing. NLTK requires Python version from 3.10 up to the latest 3.14.

For documentation, please visit [nltk.org](https://www.nltk.org/).


## Contributing

Do you want to contribute to NLTK development? Great!
Please read [CONTRIBUTING.md](CONTRIBUTING.md) for more details.

See also [how to contribute to NLTK](https://www.nltk.org/contribute.html).


## Donate

Have you found the toolkit helpful?  Please support NLTK development by donating
to the project via PayPal, using the link on the NLTK homepage.


## Citing

If you publish work that uses NLTK, please cite the NLTK book, as follows:

    Bird, Steven, Edward Loper and Ewan Klein (2009).
    Natural Language Processing with Python.  O'Reilly Media Inc.


## Copyright

Copyright (C) 2001-2026 NLTK Project

For license information, see...

## AI interpretation — verify before relying

NLTK is a comprehensive Python toolkit for natural language processing, offering modules for tokenization, parsing, tagging, and linguistic analysis alongside curated datasets and educational resources.

Verdict: NLTK is a mature, actively maintained production-grade NLP toolkit with no known vulnerabilities, permissive licensing, and minimal installation friction. Its broad ecosystem of corpora and tutorials makes it ideal for both research and education.

[View on SkillFed](https://skillfed.io/packages/nltk) · [View on PyPI](https://pypi.org/project/nltk/)