ICU Message Editor
Build and test ICU MessageFormat strings with live preview, 140+ templates, and syntax validation. Works with react-intl, i18next, and more.
Why use this tool?
140+ Templates
Production-ready templates for plurals, select, dates, currencies, and more.
Live Preview
See your formatted output instantly as you type with test variables.
Syntax Validation
Real-time validation ensures your ICU messages are correct before copying.
Frequently Asked Questions
What is ICU Message Format?
ICU (International Components for Unicode) MessageFormat is the standard for formatting strings with plurals, selects, numbers, dates, and times for software localization. It's supported by most major libraries like react-intl, i18next, and formatjs.
Does this editor support nested messages?
Yes, the editor supports complex nested messages including multiple levels of select and plural arguments. You can test these by selecting different variable combinations in the preview panel.
Is this tool free?
Yes, this ICU Message Editor is completely free to use for unlimited validations. It's built by the team at IntlPull to help developers debug their localization strings.