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NLTK

A long-standing Python toolkit for teaching and researching how computers process human language.

What it does

NLTK, the Natural Language Toolkit, is a set of Python tools, data sets and tutorials for natural language processing, the field of getting computers to work with human language.

It is widely used in research and education, and has a companion book, Natural Language Processing with Python.

Who it's for

Students, teachers and researchers learning or working in language processing.

Can I use it without coding?

Developers only. A Python library. New to this? Start here.

Can I run it?

Cost
FreeNothing to pay or sign up for.
API key
Not needed

Try it

Using Claude Code, Cursor or another AI coding assistant? Paste the prompt and it will walk you through the setup.New to this?

Before you install

  • Only download from the official GitHub page. Copies with similar names exist for many popular projects.
  • License (Apache-2.0): Permissive: free to use, change and share, including for business.
  • More on staying safe

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