Free Online JSON to TypeScript Converter

Generate TypeScript interfaces from JSON instantly. Supports nested objects and arrays.

JSON Input
TypeScript Output
Generated interfaces
Options

How to Convert JSON to TypeScript

Our JSON to TypeScript converter analyzes your JSON structure and generates properly typed TypeScript interfaces. It automatically detects data types, handles nested objects, arrays of objects, and creates clean, maintainable type definitions.

Features

The converter supports nested objects (creating separate interfaces), arrays with type inference, optional properties, and custom root interface names. Choose between interface and type syntax based on your preference.

Privacy First

All conversion happens locally in your browser. Your JSON data (including API responses and configurations) is never sent to any server, making this tool safe for sensitive data.

Frequently Asked Questions

Our converter analyzes your JSON structure and generates corresponding TypeScript interfaces. It detects data types, handles nested objects and arrays, and creates properly typed definitions.

Yes! The converter handles deeply nested objects, arrays of objects, mixed arrays, and optional properties. Each nested structure gets its own interface for clean, maintainable code.

You can set a custom root interface name, choose between interfaces and types, and toggle optional properties. The output is fully editable before copying.

Absolutely. All conversion happens 100% locally in your browser. Your JSON data is never sent to any server, making it safe for sensitive API responses and configurations.

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