unicode-org/icu

The home of the ICU project source code.

3,597

stars

27,405

commits

C++

primary language

Sep 10, 2026

updated

icu.unicode.org/
c-plus-plus
cpp
i18n
icu
icu4c
icu4j
java
unicode
unicode-consortium

README

International Components for Unicode

This is the repository for the International Components for Unicode. The ICU project is under the stewardship of The Unicode Consortium.

ICU Logo

Build Status (main branch)

BuildStatus
GitHub Actions (ICU4C)GHA ICU4C
GitHub Actions (ICU4J)GHA ICU4J
GitHub Actions (Valgrind)GHA CI Valgrind
Exhaustive TestsExhaustive Tests for ICU
FuzzingFuzzing Status
OpenSSF ScorecardOpenSSF Scorecard

Quality Reports (main branch)

Subdirectories and Information

Copyright © 2016 and later: Unicode, Inc. Unicode and the Unicode Logo are registered trademarks of Unicode, Inc. in the United States and other countries. License & terms of use: https://www.unicode.org/copyright.html

A CLA is required to contribute to this project - please refer to the CONTRIBUTING.md file (or start a Pull Request) for more information.

The contents of this repository are governed by the Unicode Terms of Use and are released under LICENSE.

Contributors

(top 30 of 221)

grhoten

6,316 commits

markusicu

3,613 commits

srl295

2,246 commits

poulsbo

2,123 commits

unicode-org/icu

The home of the ICU project source code.

3,597

stars

27,405

commits

C++

primary language

Sep 10, 2026

updated

icu.unicode.org/
c-plus-plus
cpp
i18n
icu
icu4c
icu4j
java
unicode
unicode-consortium

README

International Components for Unicode

This is the repository for the International Components for Unicode. The ICU project is under the stewardship of The Unicode Consortium.

ICU Logo

Build Status (main branch)

BuildStatus
GitHub Actions (ICU4C)GHA ICU4C
GitHub Actions (ICU4J)GHA ICU4J
GitHub Actions (Valgrind)GHA CI Valgrind
Exhaustive TestsExhaustive Tests for ICU
FuzzingFuzzing Status
OpenSSF ScorecardOpenSSF Scorecard

Quality Reports (main branch)

Subdirectories and Information

Copyright © 2016 and later: Unicode, Inc. Unicode and the Unicode Logo are registered trademarks of Unicode, Inc. in the United States and other countries. License & terms of use: https://www.unicode.org/copyright.html

A CLA is required to contribute to this project - please refer to the CONTRIBUTING.md file (or start a Pull Request) for more information.

The contents of this repository are governed by the Unicode Terms of Use and are released under LICENSE.

Contributors

(top 30 of 221)

grhoten

6,316 commits

markusicu

3,613 commits

srl295

2,246 commits

poulsbo

2,123 commits

Languages

C++

43.9%

Java

39.7%

C

13.8%