About FormatJS


FormatJS was created by the Yahoo Presentation Technologies (YPT) team, with special thanks to Andy Earnshaw and Norbert Lindenberg.

Industry Standards

FormatJS builds on the ECMAScript Internationalization API (ECMA-402), uses locale data from the CLDR, and works with the industry standard ICU Message syntax used by professional translators.


FormatJS, the libraries and website, builds on the work of others:


Please report security issues to the Yahoo Bug Bounty Program.