Word Stemming Stemmers NLP Tools

Tools and libraries for reducing words to their root or base form through stemming algorithms across various languages. Includes language-specific stemmers, Porter stemming implementations, and multilingual stemming frameworks. Does NOT include lemmatization, morphological analysis beyond stemming, or general text normalization.

There are 56 word stemming stemmers tools tracked. 6 score above 50 (established tier). The highest-rated is hplt-project/sacremoses at 68/100 with 495 stars.

Get all 56 projects as JSON

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#	Tool	Score	Tier	Stars	Language
1	hplt-project/sacremoses Python port of Moses tokenizer, truecaser and normalizer	68	Established	495	Python
2	Blake-Madden/OleanderStemmingLibrary Porter stemming library (C++)	54	Established	55	C++
3	adbar/simplemma Simple multilingual lemmatizer for Python, especially useful for speed and efficiency	51	Established	188	Python
4	htaghizadeh/PersianStemmer-Python PersianStemmer-Python	51	Established	52	Python
5	michmech/lemmatization-lists Machine-readable lists of lemma-token pairs in 23 languages.	50	Established	361	—
6	winkjs/wink-porter2-stemmer Javascript Implementation of Porter Stemmer Algorithm V2 by Dr Martin F Porter	50	Established	20	JavaScript
7	damzaky/sastrawijs Indonesian language stemmer. Javascript port of PHP Sastrawi project.	49	Emerging	38	TypeScript
8	bastienbot/nlp-js-tools-french POS Tagger, lemmatizer and stemmer for french language in javascript	49	Emerging	37	JavaScript
9	sorenlind/lemmy 🤘Lemmy is a lemmatizer for Danish 🇩🇰 and Swedish 🇸🇪	47	Emerging	79	Python
10	WZBSocialScienceCenter/germalemma A lemmatizer for German language text	47	Emerging	94	Python
11	donderom/stemerge A collection of stemmers in Erlang 🌱	46	Emerging	4	Erlang
12	winkjs/wink-lemmatizer English lemmatizer	44	Emerging	69	JavaScript
13	FinNLP/lemmatizer 📦 English word lemmatizer	44	Emerging	17	TypeScript
14	deniskyashif/ssfst Rewrite text in linear time.	44	Emerging	81	JavaScript
15	master/spark-stemming Spark MLlib wrapper for the Snowball framework	42	Emerging	34	Java
16	LeonieWeissweiler/CISTEM Stemmer for German	41	Emerging	45	C
17	yohasebe/lemmatizer Lemmatizer for text in English. Inspired by Python's...	40	Emerging	112	Ruby
18	xiamx/gen_fst Elixir module that implements a generic finite state transducer with...	39	Emerging	9	Elixir
19	xiamx/lemma A Morphological Parser (Analyser) / Lemmatizer written in Elixir.	39	Emerging	50	Elixir
20	luridarmawan/StemmingWord Tools StemmingWord berbasis web, menggunakan bahasa pascal dengan framework FastPlaz	38	Emerging	15	Pascal
21	htaghizadeh/JPersianStemmer Persian stemmer	37	Emerging	15	Java
22	writecrow/lemmatizer A PHP library for getting a lemma from a given word, and getting a list of...	37	Emerging	13	PHP
23	tokenmill/snowball Snowball version of the Porter stemmer for the Lithuanian language.	34	Emerging	7	—
24	dzieciou/pystempel Python port of Stempel, an algorithmic stemmer for Polish language.	34	Emerging	39	HTML
25	Cirice/Ereina Language rules for Persian texts	33	Emerging	6	Haskell
26	putuwaw/linggapy Library for Stemming Balinese Text Language	32	Emerging	1	Python
27	andrianllmm/tagalog-stemmer A Python library for Tagalog word stemming	31	Emerging	1	Python
28	andrianllmm/aklanon-stemmer A Python library for Aklanon word stemming	31	Emerging	1	Python
29	anishLearnsToCode/porter-stemmer Python Implimentation of the Famous Porter Stemmer Algorithm used in...	30	Emerging	2	Jupyter Notebook
30	zentrum-lexikographie/sfst-transduce Python bindings for SFST focusing on transducer usage	30	Emerging	4	C++
31	htaghizadeh/PersianStemmer A New Rule-Based Persian Stemmer Using Regular Expression	30	Emerging	6	Pascal
32	naomilago/pt_lemmatizer This repo aims to store code for a Portuguese Lemmatizer, a PyPI package.	30	Emerging	2	Python
33	kampsy/gwizo Simple Go implementation of the Porter Stemmer algorithm with powerful features.	30	Emerging	27	Go
34	greenat92/arabicstemmer_frontend frontend web app for snowball arabic stemmer algorithm	29	Experimental	7	JavaScript
35	stdlib-js/nlp-porter-stemmer Extract the stem of a given word.	29	Experimental	4	JavaScript
36	mshka/farsi_processor Farsi processor is a Ruby gem to process (stem and normalize) Persian/Farsi text	28	Experimental	8	Ruby
37	SeekStorm/snowball-stemmers-rs snowball_stemmers_rs: a Snowball stemmer in 38 languages, in Rust	26	Experimental	1	Rust
38	joom/Divan.hs Ottoman Divan poetry vezin checker in Haskell!	26	Experimental	39	Haskell
39	Flight-School/lemma A command-line utility that lemmatizes words in natural language text.	23	Experimental	28	Swift
40	domPatera/stemmer-bundle This bundle integrates the dompat/stemmer library into Symfony. It provides...	22	Experimental	1	PHP
41	domPatera/stemmer PHP Library for word stemming. This library helps reduce words to their base...	22	Experimental	1	PHP
42	N8Brooks/snowball ⛄ Snowball stemmers for Deno.	20	Experimental	5	JavaScript
43	openderocknlp/extract-lemmatized-nonstop-words Extracts a pure list of stemmed words of a text filtered by stop words	20	Experimental	5	JavaScript
44	antonbaumann/german-go-stemmer An efficient implementation of the German porter-stemming algorithm in Golang.	20	Experimental	6	Go
45	ancatmara/early-irish-lemmatizer A DIL-based lemmatizer for Early Irish data.	19	Experimental	4	Jupyter Notebook
46	Wollaston/ArabicStemmer A small web app that uses NLTK's Arabic stemming algorithms to identify the...	17	Experimental	1	Svelte
47	olga-black/truecase_german A program for truecasing German text with incorrect capitalization	17	Experimental	1	Python
48	golang-nlp/stopwords Stopwords module for golang	17	Experimental	—	Go
49	rojvv/rustress JavaScript library to mark stresses in Russian text.	15	Experimental	—	TypeScript
50	dariubs/persian.rb Ruby Persian gem.	15	Experimental	25	Ruby
51	ontypehq/libfst Finite-state transducer library for text normalization	11	Experimental	—	Zig
52	FinNLP/en-stemmer 📦 Porter stemmer implementation	11	Experimental	—	TypeScript
53	crlwingen/TagalogWordStemmer Tagalog Word Stemmer made with Java.	11	Experimental	—	Java
54	renan823/portuguese-stemmer Go implementation of Snowball Portuguese Stemmer	11	Experimental	—	Go
55	faisaltareque/Multilingual-Sentence-Tokenizer This Python package is designed for tokenizing sentences in over 40...	11	Experimental	3	Python
56	faisaltareque/Multilingual-Stemmer Python package for stemming words in 15+ different languages. It is a...	10	Experimental	2	Lex

Comparisons in this category

wink-lemmatizer and lemmatizer (44 vs 44)