Natural Language Toolkit

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Natural Language Toolkit
Toolkit for writing programs that process natural language

The NL Toolkit simplifies the construction of programs that process natural language and defines standard interfaces between the different components of an NLP system. NLTK includes graphical demonstrations, sample data, tutorials, and API documentation.


User tutorials available in HTML format from; API doumentation available in HTML format from

Related Projects

  • Natural Docs
  • Deduce


LicenseVerified byVerified onNotes
License:GPLv2Janet Casey19 August 2003

Leaders and contributors

Edward Loper Maintainer

Resources and communication

AudienceResource typeURI
HelpMailing List Info/Archive
DeveloperMailing List Info/Archive
DeveloperVCS Repository Webview

Software prerequisites

Weak prerequisiteTkinter (to use the GUI toolkit)
Weak prerequisiteNumeric (adds fast array facility)
Required to usePython 2.1 or later

This entry (in part or in whole) was last reviewed on 13 February 2017.


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