Translate iOS Localizable.strings files online

What is the iOS Localizable.strings format?

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.

It is used by iOS, macOS, watchOS, tvOS. SimpleLocalize reads and writes it natively, so you keep your existing project structure. Format value for the CLI and API: localizable-strings. Read the format documentation.

How to translate iOS Localizable.strings files

1. Create a free account and a project. The Community plan covers small apps with no credit card.
2. Import your .strings file in the web editor, or push it from the terminal with the CLI.
3. Add target languages and run auto-translation. Use DeepL or Google Translate for speed, or OpenAI, Claude and Gemini with your own API key for context-aware translations.
4. Review in the editor with QA checks, glossary and screenshots, then download the iOS .strings files or publish them to the translation hosting CDN.

Sync iOS .strings files from CI

Add a simplelocalize.yml to the repository and run simplelocalize upload and simplelocalize download in your pipeline or GitHub Action:

# simplelocalize.yml
apiKey: YOUR_PROJECT_API_KEY
uploadFormat: localizable-strings
uploadPath: ./locales/{lang}.strings
downloadFormat: localizable-strings
downloadPath: ./locales/{lang}.strings

Convert iOS .strings to other formats

The same project can export translations in more than 30 formats, and the free online converter works without an account:

• Convert iOS .strings to JSON
• Convert iOS .strings to Multi-language JSON
• Convert iOS .strings to YAML
• Convert iOS .strings to CSV
• Convert iOS .strings to TSV
• Convert iOS .strings to Excel
• Convert iOS .strings to XLIFF 1.2
• Convert iOS .strings to XLIFF 2.0
• Convert iOS .strings to Android XML
• Convert iOS .strings to iOS .stringsdict

All conversions and free translation tools.