The Stanford NLP Group makes some of our Natural Language Processing software available to everyone! We provide statistical NLP, deep learning NLP, and rule-based NLP tools for major computational linguistics problems, which can be incorporated into applications with human language technology needs. These packages are widely used in industry, academia, and government.
This code is actively being developed, and we try to answer questions and fix bugs on a best-effort basis.
These software distributions are open source, licensed under the GNU General Public License (v3 or later for Stanford CoreNLP; v2 or later for the other releases). Note that this is the full GPL, which allows many free uses, but does not allow its incorporation (even in part or in translation) into any type of proprietary software which you distribute. Commercial licensing is also available; please contact us if you are interested. Bug fixes and code contributions are very welcome; see the contributing page on our GitHub site.
Have a support question? Please ask us on Stack Overflow using the tag stanford-nlp.
Feedback, questions, licensing issues, and bug reports / fixes can also be sent to our mailing lists (see immediately below).
We have 3 mailing lists for
all of which are shared
with other JavaNLP tools (with the exclusion of the parser). Each address is
java-nlp-user This is the best list to post to in order
to send feature requests, make announcements, or for discussion among JavaNLP
users. (Please ask support questions on
Stack Overflow using the
You have to subscribe to be able to use this list.
Join the list via this webpage or by emailing
email@example.com. (Leave the
subject and message body empty.) You can also
the list archives.
java-nlp-announce This list will be used only to announce
new versions of Stanford JavaNLP tools. So it will be very low volume (expect 2-4
messages a year). Join the list via this webpage or by emailing
firstname.lastname@example.org. (Leave the
subject and message body empty.)
java-nlp-support This list goes only to the software
maintainers. It's a good address for licensing questions, etc. For
general use and support questions, you're better off using Stack
Overflow or joining and using
You cannot join
java-nlp-support, but you can mail questions to