xxUTF – SIMD Unicode Normalization

In plain words

xxUTF is a software library for Unicode normalization using SIMD (Single Instruction Multiple Data) technology. It is designed for developers who need to process and standardize Unicode text efficiently. The tool stands out by leveraging SIMD instructions to accelerate Unicode normalization operations, making it useful for applications that handle large volumes of text or require high-performance string processing. The project is available on GitHub.

written from the facts on this page · September 2026

From the sources

xxUTF is a C library that implements Unicode normalization algorithms at speed using SIMD. Here are some features: xxUTF is distributed as an amalgamation with a single header file, available at the release page . This is similar to what SQLite does . #include <xxutf.h> #include <string.h> #include <stddef.h> #include <stdio.h> int main () { const char * s = "Ȁ character that needs to be decomposed" ; size_t length = strlen ( s ); printf ( "Old length: %zu\n" , length ); char out [ 64 ]; size_t out_len = xxutf_normalize_utf8_nfd ( s , strlen ( s ), out ); printf ( "New length: %zu\n" , out_len ); return 0 ; } One major goal of xxUTF is to have the simplest, most predictable API surface as…from github.com

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