Convert Multi-language JSON to JSON online
Upload a Multi-language JSON file and download it as JSON. Translation keys, plurals and placeholders are preserved. Free, no account needed.
Pick the source format or let the converter detect it from the file.
Choose the format you want to download.
A flat or nested key-value JSON file with translations for one language. It is the most common format for web and mobile apps because every language can parse it and it maps directly to the way i18n libraries look up strings.
Need it the other way round? Convert JSON to Multi-language JSON.
From: Multi-language JSON
A single JSON file where every translation key holds an object with one entry per language. Handy for small projects, static sites and CDN delivery because all languages travel together.
Used by: custom i18n setups, static site generators, CDN delivery. All languages in one file. Read the Multi-language JSON format guide.
{
"en_US": {
"hello.world": "Hello World!",
"my_address": "My address"
},
"pl_PL": {
"hello.world": "Witaj Świecie!",
"my_address": "Mój adres"
}
}To: JSON
A flat or nested key-value JSON file with translations for one language. It is the most common format for web and mobile apps because every language can parse it and it maps directly to the way i18n libraries look up strings.
Used by: i18next, react-intl, vue-i18n, next-intl, Angular, Node.js. One language per file. Read the JSON format guide.
{
"hello.world": "Hello World!",
"my_address": "Address",
"nested": {
"translation": {
"key": "nested translation key"
}
}
}How to convert Multi-language JSON to JSON
- Drop your .json file into the converter above, or paste its content.
- Click Convert. You get one .json file per language.
- Preview the result, copy it or download the files.
What changes between Multi-language JSON and JSON
- Multi-language JSON holds every language in one file, so the converter writes one JSON file per language found in the source.
- Keys are written flat by default. Enable "Write nested keys" to turn a.b.c into nested objects.
Convert and translate in one place
If you need the JSON file in more languages, the fastest route is a free SimpleLocalize project: import the Multi-language JSON file, add languages, run auto-translation with DeepL, Google Translate, OpenAI, Claude or Gemini, and download the result as JSON. The CLI does the same from CI with upload and download commands, so the conversion becomes part of your build. See also translating Multi-language JSON files.
Frequently asked questions
Is the converter free?
Yes. There is no signup and no limit on the number of conversions beyond a few requests per second.
Are my files stored?
No. The file is parsed in memory, converted and returned in the same request. Nothing is written to disk or a database.
What about plurals and placeholders?
Plural forms are normalized to ICU message syntax and written back in the native form of JSON. Placeholders are kept, and Apple and Android specific syntax is translated between platforms. Read more in the pluralization guide.
Convert Multi-language JSON to other formats
Translate your JSON files
- Import Multi-language JSON or JSON files into a free project
- Auto-translate with DeepL, Google, OpenAI, Claude or Gemini
- Download in any of the supported formats or publish to the CDN