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nltk
Python

nltk

NLTK Source

by nltk · GitHub
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2009
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machine-learningnatural-language-processingnlpApache-2.0Python
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In plain words

Use a toolkit to help with tasks in understanding and processing human language.

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14.68k14.66k
2026-06-282026-08-31
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📄 About

NLTK Source

nltk has 14.7k stars on GitHub. It has been forked 3k times. nltk is written mainly in Python. It has been in active development since 2009. nltk is available under the Apache-2.0 license. Its main topics are machine-learning, natural-language-processing, nlp, nltk.

Frequently asked questions

What is nltk?

NLTK Source

Is nltk open source?

nltk is an open-source project. It is released under the Apache-2.0 license.

Is nltk free?

Yes. nltk is free and open source — you can use, modify and self-host it.

What license does nltk use?

nltk is available under the Apache-2.0 license.

What language is nltk written in?

nltk is written mainly in Python.

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