unicode-org/icu4x

Health v2 · maintenance only

Flags: no_license

Adoption not part of the score

1856 stars · 285 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

ICU4X is a Rust implementation of Internationalization Components of Unicode (ICU) built on CLDR data, designed to be small, modular, and fast for client-side and resource-constrained environments. It exposes APIs usable from multiple languages via bindings (npm, pub.dev, etc.) and covers locale handling, date/time formatting, and other i18n components.

Use cases

• format dates and times for a specific locale in Rust
• add internationalization to a WebAssembly app
• handle locales and CLDR data in resource-constrained environments
• localize number and date formatting across languages
• embed i18n support in a mobile or embedded application
• replace heavyweight ICU4C/ICU4J with a small modular i18n library

When to choose

• you need standards-based i18n in Rust or via FFI in other languages
• binary size and performance matter, such as client-side or embedded targets
• you want pluggable, minimal CLDR locale data
• you need Unicode Consortium-backed i18n best practices

When to avoid

• you need a full-featured mature ICU implementation in C/C++ or Java today
• your project is not Rust-based and existing bindings don't cover your platform
• you only need simple string translation without locale-aware formatting

Facets

library · maturity active

internationalization date-time parser sdk cross-platform developer-tools rust cross-platform wasm embedded unicode cldr locale-data icu resource-constrained multi-language-bindings localization natural-language-processing web-server

Member repositories

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