How does JSON translation work?

The tool uses OpenAI's language models to translate string values in your JSON while preserving the structure, data types, and non-string values (numbers, booleans, null).

Can I translate JSON keys as well?

Yes, you can enable the 'Translate Keys' option to translate both object keys and values, or keep it disabled to only translate values.

What models are supported?

The tool supports all OpenAI models including GPT-5.1 (latest), GPT-4o, GPT-4 Turbo, GPT-3.5 Turbo, O1, O3 series, and custom models.

Is my API key secure?

Yes, your API key is never stored on our servers. It's only used for translation requests and is handled securely through our backend.

Does the tool preserve JSON structure?

Yes, the tool maintains the exact JSON structure including arrays, objects, nesting, and data types. Only string values are translated.

Can I see token usage?

Yes, after each translation, you'll see detailed token usage including input tokens, output tokens, cached tokens, and total tokens for cost estimation.

JSON Translator - Translate JSON Data with AI | MoonSys

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JSON Translator

Translate JSON data between 100+ languages using OpenAI's powerful language models. Preserves JSON structure while translating values.

OpenAI API Key

Your API key is never stored. It's only used for translation requests.

Language Selection

From

Select Model

JSON Input

Characters: 0

Translate KeysAlso translate object keys (default: only values)

Features:

Translate JSON data between 100+ languages
Supports latest OpenAI models including GPT-5.1
Preserves JSON structure and data types
Option to translate keys or only values
Token usage tracking for cost estimation
Copy or download translated JSON
Secure API key handling (never stored)