ToolHive

JSON to TypeScript Converter

Paste a JSON payload and safely extract strongly typed TypeScript interfaces in one second.

json to tsjson to typescripttypescript interface generator

Interactive Converter

Root Interface Name:
"id": 1, "name": "Alex", "isActive": true ...

Intro

Save time drafting types manually. This tool infers types recursively across nested JSON objects and arrays.

How to use

  1. Paste JSON data
    Enter your JSON object or array into the input field.
  2. Generate TypeScript
    The tool infers types from your data and generates TypeScript interfaces automatically.
  3. Copy interface code
    Copy the generated TypeScript definitions into your .ts project files.

Examples

Basic API Response
Generate an interface from a Simple JSON object.
Input
{"id": 1, "name": "Tool"}
Output
export interface Root {
  id: number;
  name: string;
}
Array of objects
Generate TypeScript interfaces for a JSON array of objects.
Input
[{"id":1,"name":"Alice"},{"id":2,"name":"Bob"}]
Output
interface RootObject {
  id: number;
  name: string;
}

FAQ

What does JSON-to-TypeScript conversion do?

It analyzes the structure of your JSON data and generates TypeScript interface or type definitions that match the shape of your data, enabling type safety in your codebase.

Does it handle nested objects and arrays?

Yes, the tool recursively generates interfaces for nested objects and correctly types arrays, including arrays of objects with their own interfaces.

Can I customize the generated interface names?

The tool provides default interface names based on the JSON structure. You can rename them after copying the output into your codebase.

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