Convert iOS .strings to JSON online

Upload a iOS Localizable.strings 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.

Used when the source format holds one language per file. Also used as the source language for XLIFF output.

Choose the format you want to download.

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.

One file per language. Format documentation

Need it the other way round? Convert JSON to iOS .strings.

From: iOS Localizable.strings

The classic Apple format: one "key" = "value"; line per string inside an .lproj folder. Still widely used in UIKit, SwiftUI and macOS projects that have not moved to String Catalogs.

Used by: iOS, macOS, watchOS, tvOS. One language per file. Read the iOS .strings format guide.

"hello_world" = "Hello World!"; "my_address" = "My address";
"hello_world" = "Hello World!";
"my_address" = "My address";

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" } } }
{
  "hello.world": "Hello World!",
  "my_address": "Address",
  "nested": {
    "translation": {
      "key": "nested translation key"
    }
  }
}

How to convert iOS .strings to JSON

  1. Drop your .strings file into the converter above, or paste its content.
  2. Confirm the language of the file. It is guessed from the file name, for example de.json or messages_pt-BR.properties.
  3. Click Convert. You get one .json file per language.
  4. Preview the result, copy it or download the files.

What changes between iOS .strings and JSON

  • 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 iOS .strings 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 iOS .strings 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 iOS .strings to other formats

Convert other formats to JSON

See all 342 conversions or browse more translation tools.
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Translate your JSON files

  • Import iOS .strings 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
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