Downloading ICU

Release candidate

2022-09-26: The ICU 72 release candidate is now available. Please use it for testing (and give us feedback), but do not use it in production. We will release ICU 72 in October. For details, see Downloading ICU > ICU 72.

ICU 72 updates to Unicode 15, including new characters, scripts, emoji, and corresponding API constants. It also updates to CLDR 42 locale data with various additions and corrections.

ICU 72 adds technology preview implementations for person name formatting, as well as for a new version of message formatting based on a proposed draft Unicode specification.

Latest Release

2022-04-07: ICU 71 is now available. It updates to CLDR 41 locale data with various additions and corrections. ICU 71 adds phrase-based line breaking for Japanese, for short Japanese text, such as in titles and headings; and adds support for Hindi written in Latin letters (hi_Latn), aka “Hinglish”. For details, see Downloading ICU > ICU 71.

Recent Releases

If you want to use ICU (as opposed to developing it), it is recommended that you download an official packaged version of the ICU source code. These versions are tested more thoroughly than day-to-day development builds of the system, and they are packaged in zip and tar files for convenient download. Here are several recent releases of ICU that are available:

🚧 TODO 🚧: Please pardon our dust; we will soon fix the links in the table below. You can also find previous releases in the nav bar under “Downloading ICU”.


2021-10-27: ICU 70 updates to Unicode 14, including new characters, scripts, emoji, and corresponding API constants. ICU 70 adds support for emoji properties of strings. It also updates to CLDR 40 locale data with many additions and corrections. ICU 70 also includes many other bug fixes and enhancements, especially for measurement unit formatting. For details about new features and other improvements, see Download ICU 70.

For more details on building ICU once you've checked out the code, please see the ICU4C or ICU4J readme (linked from the nav bar).

Note: In 2012, starting with ICU 49, we changed the ICU release version numbering, combining the former first two fields into one, thus the major release sequence is ..., ICU 4.6, ICU 4.8, ICU 49, ICU 50, ICU 51, …

For older ICU releases see the Old ICU Releases page.

Other Downloads

The following are some ICU tools that are available in addition to ICU.