1. Enter your input
Paste text, code, data, or the value you want to inspect.
JSON to TypeScript
Convert JSON to TypeScript interfaces online. Paste a JSON object or array, choose an interface name, and copy a starter type definition for API data.
2. Run the tool
Format, encode, decode, validate, test, or generate the result instantly.
3. Copy the output
Use the cleaned result in your code, docs, API workflow, or notes.
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When to convert JSON to TypeScript
Generating a TypeScript interface from JSON is useful when exploring API responses, creating client models, documenting payloads, or starting typed frontend code.
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JSON to TypeScript FAQ
Does this generate production-ready types?
It creates a starter interface from the sample shape. Review optional fields, nested objects, and arrays before using it in production code.
Can I paste an array?
Yes. If you paste an array of objects, the first object is used as the sample shape.
Why are nested objects simplified?
The first version keeps nested objects broad so the output stays quick and readable. Complex nested typing can be refined manually.