Text Normalization Engines Voice AI Tools

Tools for normalizing written text into spoken forms across languages, handling numbers, dates, abbreviations, and special characters for TTS and speech processing. Does NOT include general text-to-speech synthesis, speech recognition, or audio processing.

There are 17 text normalization engines tools tracked. 1 score above 50 (established tier). The highest-rated is speechio/chinese_text_normalization at 51/100 with 722 stars.

Get all 17 projects as JSON

curl "https://pt-edge.onrender.com/api/v1/datasets/quality?domain=voice-ai&subcategory=text-normalization-engines&limit=20"

Open to everyone — 100 requests/day, no key needed. Get a free key for 1,000/day.

#	Tool	Score	Tier	Stars	Language
1	speechio/chinese_text_normalization Chinese text normalization for speech processing	51	Established	722	Python
2	NickZaitsev/ru-normalizr ru-normalizr — лучший open-source нормализатор русского текста. Приводит...	45	Emerging	8	Python
3	gladiaio/normalization A lightweight library for normalizing speech transcripts before computing WER	43	Emerging	10	Python
4	34j/mecab-text-cleaner Simple Python package (CLI/Python API) for getting japanese readings...	42	Emerging	7	Python
5	repodiac/german_transliterate Python module to clean and transliterate (i.e. normalize) German text...	42	Emerging	36	Python
6	google-research-datasets/TextNormalizationCoveringGrammars Covering grammars for English and Russian text normalization	39	Emerging	60	Makefile
7	ducnt18121997/Viet-Text-Normalization A Python library for text normalization, specifically designed for...	36	Emerging	13	Python
8	ScottishFold007/TTSAudioNormalizer TTSAudioNormalizer is a specialized tool for TTS data production,...	32	Emerging	111	Python
9	tomaarsen/TTSTextNormalization Convert English text from written expressions into spoken forms	32	Emerging	28	Python
10	stefantaubert/english-text-normalization Command-line interface (CLI) and library to normalize English texts.	31	Emerging	4	Python
11	Agash/TTSTextNormalization Modern .NET10 / C#14 library to normalize text (emojis, currency, numbers,...	29	Experimental	6	C#
12	NetherQuartz/TextForSpeechNormalizer A Python library to accentuate Russian text	28	Experimental	11	Python
13	cewarman/NTPU_online_text_normalization An online text normalization tool for Chinese-English mixed text-to-speech system	25	Experimental	5	Python
14	seanghay/khmertagger KhmerTagger: Inverse Text Normalization for Khmer Automatic Speech Recognition	22	Experimental	7	Python
15	Amir79Naziri/TextNormalization_Project Implementing text normalization for Farsi(Persian) language.	22	Experimental	2	Python
16	rafalposwiata/text-normalization Repository for text normalization research.	22	Experimental	6	—
17	bmwasaru/kiswahili-speech-normalization Kiswahili text normalization utilities for speech datasets (ASR/TTS)	14	Experimental	—	Python