Convert Multi-language JSON to CSV online
Upload a Multi-language JSON file and download it as CSV. 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 comma-separated spreadsheet with one row per translation key and one column per language. CSV is the easiest way to hand translations to people who work in Excel or Google Sheets.
Need it the other way round? Convert CSV 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: CSV
A comma-separated spreadsheet with one row per translation key and one column per language. CSV is the easiest way to hand translations to people who work in Excel or Google Sheets.
Used by: Excel, Google Sheets, translation agencies. All languages in one file. Read the CSV format guide.
"key","english","polish"
"welcome","Welcome!","Witajcie"
"about-us","About Us","O nas"
"register","Register","Rejestracja"How to convert Multi-language JSON to CSV
- Drop your .json file into the converter above, or paste its content.
- Click Convert. You get a single .csv file with all languages.
- Preview the result, copy it or download the file.
What changes between Multi-language JSON and CSV
- Keys, texts, plural forms and placeholders are mapped one to one. Comments and descriptions are kept when both formats support them.
Convert and translate in one place
If you need the CSV 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 CSV. 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 CSV. 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 CSV files
- Import Multi-language JSON or CSV 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