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JSON to TypeScript

Generate TypeScript interfaces from JSON data

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Export keywordRoot name :

JSON Input

TypeScript Output

About JSON to TypeScript

The JSON to TypeScript converter generates TypeScript interfaces from any JSON data. It supports nested objects, arrays, optional fields, and configurable root names. Everything runs in your browser — your data is never sent to a server.

Frequently Asked Questions

How does it handle nested objects?

The tool automatically creates separate interfaces for nested objects. Each nested object gets its own interface with a name derived from its key. Arrays of objects are also handled — the tool infers the element type from the first item.

Is my JSON data sent to a server?

No, all conversion happens entirely in your browser. Your JSON data never leaves your device. This is safe for working with sensitive API responses or private configuration files.

Can I customize the generated types?

Yes, you can set a custom root interface name, toggle the export keyword, and make all fields optional. These options help you generate types that fit your existing codebase conventions.