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JSON to TypeScript

Automatically generate TypeScript interfaces and types from JSON data. Saves time on manual type definitions and prevents errors.

Enter JSON
Paste your JSON here
TypeScript Output
Results will appear here
How to use
  1. 1Paste your JSON
  2. 2Click Convert
  3. 3Copy the TypeScript interfaces
Features
  • JSON to TypeScript

    Generates TypeScript interfaces from JSON structures.

  • Nested Types

    Automatically creates interfaces for nested objects.

  • Array Types

    Detects array types and generates corresponding TypeScript definitions.

  • Optional Properties

    Marks optional properties with ?.

FAQ

Are all JSON types supported?

Yes, string, number, boolean, null, arrays and objects are correctly converted to TypeScript.

How are arrays handled?

Arrays are defined as Array<Type> or Type[], depending on content.

What happens with inconsistent data?

The tool chooses the best matching type or uses union types (Type1 | Type2).

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Note: All processing happens in your browser. Your files are not uploaded to any server.