i18n JSON Translator Tool

i18n JSON Translator Tool is a free, open-source web app that uses AI to translate internationalization (i18n) JSON language files, producing accurate, ready-to-use JSON output while keeping all data in your browser.

What is i18n JSON Translator Tool?

i18n JSON Translator Tool is a browser-based (web) utility that accepts a JSON language file — typically used for i18n/internationalization — and translates its string values into one or more of 30+ languages using AI. The output is a new JSON file with an identical structure, which you can copy or download. It runs entirely in your browser, so no file data is ever uploaded to a server. The tool is free and open source, and it leverages multiple AI backends including Google, DeepSeek, Anthropic, and OpenAI for translation.

Key Features

• AI-Powered Translation — Uses models from Google, DeepSeek, Anthropic, and OpenAI to translate your JSON strings with context-aware accuracy.
• Multi-Language Support — Supports over 30 target languages, covering major global markets.
• Automatic JSON Formatting — Preserves the original JSON structure and formatting, so the translated file is immediately usable.
• Copy or Download — Output can be copied to the clipboard or downloaded as a .json file directly from the browser.
• 100% Client-Side Processing — All translation happens locally in your browser; no JSON data is uploaded to any cloud server, ensuring privacy and security.
• Free and Open Source — No cost to use, and the source code is available for review or self-hosting.

Who should use i18n JSON Translator Tool?

• Software developers — Quickly localize app UI strings stored in JSON files without setting up a translation pipeline.
• i18n managers — Automate the first pass of translating locale files for different markets, then refine manually.
• Freelancers and small teams — Avoid subscription fees of commercial translation platforms by using a free, browser-based tool.

What can you do with i18n JSON Translator Tool?

• Localize a React or Vue app: Translate your en.json into French, Spanish, Japanese, etc., and drop the output back into your project.
• Batch-translate multi-language files: If you already have a JSON file with nested keys, the tool handles nested structures and produces output in each chosen language.
• Verify translations before committing: Use the in-browser preview (copy/download) to quickly spot-check tone or terminology across locales.

How does i18n JSON Translator Tool work?

1. Open the tool in your browser.
2. Paste or upload your i18n JSON file (e.g., en.json).
3. Choose the source language and target language(s) from the 30+ supported.
4. Select an AI provider (Google, DeepSeek, Anthropic, or OpenAI) and start the translation.
5. Review the translated JSON in the browser, then copy or download the resulting file.

Pricing

The tool is free and open source. There are no subscription or usage-based charges — you can use it directly in your browser at no cost.

Alternatives

Other localization platforms such as Lokalise and Phrase provide project management, collaboration, and API integrations, whereas i18n JSON Translator Tool focuses on direct, in-browser JSON translation. For teams needing full localization lifecycle management, those platforms offer more features; for quick, private translation of JSON files, this tool is a lightweight choice.

FAQ

Is i18n JSON Translator Tool free?

Yes, it is free to use and open source. You can use it directly in your browser without paying for a subscription.

What input formats are supported?

The tool accepts JSON language files used for i18n, including nested objects. The output maintains the same JSON structure with translated values.

How many languages can I translate to?

Over 30 languages are supported. You can select one or multiple target languages from the interface.

Is my data secure?

Yes. All processing happens directly in your browser using client-side JavaScript. Your JSON files are never uploaded to a server, so your data stays local.

Which AI providers are used?

The tool uses AI models from Google, DeepSeek, Anthropic, and OpenAI to perform the translations.