JSON to TypeScript

Convert JSON data to TypeScript interface definitions with customizable interface names.

How to Use

  1. Paste your JSON data into the left input box.
  2. Optionally modify the interface name (default is RootObject).
  3. Click the "Convert" button to generate TypeScript interface definitions.
  4. Click "Copy Result" to copy the output to your clipboard.

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About JSON to TypeScript

This tool helps you quickly convert JSON data to TypeScript interface definitions. In frontend development, we often need to define corresponding TypeScript types based on API-returned JSON data. Writing these type definitions manually is time-consuming and error-prone.

Simply paste JSON data and the tool will automatically analyze the JSON structure and generate corresponding TypeScript interfaces. Supports conversion of nested objects, arrays, optional properties, and other complex types.

Frequently Asked Questions

The tool generates TypeScript interfaces with proper types (string, number, boolean, null, arrays, nested objects), optional properties, union types for mixed arrays, and JSDoc comments.

The tool analyzes your JSON values to infer the most specific types possible. It handles nested objects, arrays of mixed types, null values, and can distinguish between different number formats.

Yes, the generated interfaces are ready to use in any TypeScript project. Simply copy the output and paste it into your .d.ts file or alongside your code.