JSON to TypeScript Interfaces

Generate strict TypeScript interfaces and types from JSON online. Supports nested objects, arrays, and readonly modifiers. Free developer tool.

About this tool

JSON to TypeScript generator automatically infers and creates strict TypeScript interfaces, types, readonly modifiers, and optional field definitions from JSON.

How to use

  1. Paste your API JSON response or data structure.
  2. Set your root interface name and formatting preferences (interface vs type).
  3. Enable optional fields or readonly modifiers if desired.
  4. Copy the generated TypeScript definitions into your project.

FAQ

Does it handle nested objects and arrays?

Yes! All nested objects and array element schemas are recursively generated as distinct interfaces.

Can I make properties readonly?

Yes, toggle the Make fields readonly checkbox.

What does JSON to TypeScript Interfaces do?

JSON to TypeScript generator automatically infers and creates strict TypeScript interfaces, types, readonly modifiers, and optional field definitions from JSON.

How do I use JSON to TypeScript Interfaces?

Open the JSON to TypeScript Interfaces tool, then paste your API JSON response or data structure.

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