Online converters and validators for localization files. Free, no signup, nothing is stored on our servers.
ICU plural validator
Check ICU MessageFormat plural syntax and see which plural categories your target language actually needs.
Open toolFile converters
Convert localization files between any of these formats. Keys, values and placeholders are preserved.
Android strings.xml →
iOS .strings →
Flutter ARB →
JSON (i18n) →
Gettext PO →
Java .properties →
Need to translate this file, not just convert it?
Upload your localization file to Localization.One — AI translates your strings into 100+ languages in minutes. Free plan included.
Translate my file with AI