5 Services from localeformat.com

Formats a numeric amount as a locale-correct currency string (e.g. '1.234,56 €') using CLDR/ICU data for ~700 locales, returning the formatted string plus structural formatting rules.

Returns CLDR-versioned locale formatting rules (date order, decimal/group separators, currency position, week start) for a given BCP 47 locale tag

Validates a pre-formatted locale string (currency, number, or datetime) against CLDR rules, returning whether it is correct and explaining any differences

Formats an ISO 8601 date or datetime string into a locale-aware display string for ~700 CLDR locales, with optional timezone, date style, and time style controls.

Formats a numeric value according to CLDR conventions for a specified BCP 47 locale, returning the formatted string, resolved locale, and numbering system.