Skip to content


Switch branches/tags

EstNLTK -- Open source tools for Estonian natural language processing

EstNLTK provides common natural language processing functionality such as paragraph, sentence and word tokenization, morphological analysis, named entity recognition, etc. for the Estonian language.

The project is funded by EKT (Eesti Keeletehnoloogia Riiklik Programm).

As of version 1.7, the EstNLTK library is split into 3 Python packages:

  • estnltk_core -- package containing core data structures, interfaces and data conversion functions of the EstNLTK library;
  • estnltk -- the standard package, which contains basic linguistic analysis (including Vabamorf's morphological analysis, syntactic parsing and information extraction tools), system taggers and Postgres database tools;
  • estnltk_neural -- package containing additional linguistic analysis based on neural models (Bert embeddings tagger, Stanza syntax taggers and neural morphological tagger);

Source code of packages is available at the EstNLTK's monorepository.



EstNLTK is available for osx, windows-64, and linux-64, and for python versions 3.7 to 3.10. You can install the latest version via PyPI:

pip install estnltk==1.7.1

Alternatively, you can install EstNLTK via Anaconda. Installation steps with conda:

  1. create a conda environment with python 3.8, for instance:
conda create -n py38 python=3.8
  1. activate the environment, for instance:
conda activate py38
  1. install EstNLTK with the command:
conda install -c estnltk -c conda-forge estnltk=1.7.1

Note: for using some of the tools in estnltk, you also need to have Java installed in your system. We recommend using Oracle Java, although alternatives such as OpenJDK ( should also work.

Using on Google Colab

You can install EstNLTK on Google Colab environment via command:

!pip install estnltk==1.7.1


EstNLTK's tutorials come in the form of jupyter notebooks.

Additional educational materials on EstNLTK are available on web pages of an NLP course taught at the University of Tartu:

Note: if you have trouble viewing jupyter notebooks in github (you get an error message Sorry, something went wrong. Reload? at loading a notebook), then try to open notebooks with the help of


The source of the last release is available at the main branch.

Changelog is available here.


Tools in estnltk_neural require installation of deep learning frameworks (tensorflow, pytorch), and are demanding for computational resources; they also rely on large models which need to be downloaded separately. Instructions for installing the package can be found here.


In case you use EstNLTK in your work, please cite us as follows:

  author    = {Laur, Sven  and  Orasmaa, Siim  and  Särg, Dage  and  Tammo, Paul},
  title     = {EstNLTK 1.6: Remastered Estonian NLP Pipeline},
  booktitle = {Proceedings of The 12th Language Resources and Evaluation Conference},
  month     = {May},
  year      = {2020},
  address   = {Marseille, France},
  publisher = {European Language Resources Association},
  pages     = {7154--7162},
  url       = {}

If you use EstNLTK v1.4.1 (or older), please cite:

author = {Siim Orasmaa and Timo Petmanson and Alexander Tkachenko and Sven Laur and Heiki-Jaan Kaalep},
title = {EstNLTK - NLP Toolkit for Estonian},
booktitle = {Proceedings of the Tenth International Conference on Language Resources and Evaluation (LREC 2016)},
year = {2016},
month = {may},
date = {23-28},
location = {Portorož, Slovenia},
editor = {Nicoletta Calzolari (Conference Chair) and Khalid Choukri and Thierry Declerck and Marko Grobelnik and Bente Maegaard and Joseph Mariani and Asuncion Moreno and Jan Odijk and Stelios Piperidis},
publisher = {European Language Resources Association (ELRA)},
address = {Paris, France},
isbn = {978-2-9517408-9-1},
language = {english}