i18n health check: validate your translation files for free

Drop your i18next JSON locale files (one per language, e.g. en.json, de.json). We check for missing translations, duplicate source values, interpolation mismatches and inconsistencies. Everything runs in your browser, so your files are never uploaded.

Built by the team behind i18next and Locize.

Want live checks inside your running app instead? Try translation-check. Need machine translation? Use the i18next resource translator. No locale files yet? The repo readiness check scans a public GitHub repository for hardcoded strings and tells you the one command that fixes them.