Generate TypeScript Interfaces from JSON Instantly

Writing TypeScript interfaces for large API responses is one of the most tedious parts of frontend development.

You inspect the network tab, copy the JSON, and then spend 10 minutes manually typing: interface User { id: number; name: string... }

It's boring, error-prone, and a waste of time. Let's automate it.

Why Auto-Generate Types?

1. Speed

A complex JSON object with 200 lines of nested data takes manual effort to type out. A generator does it in 10 milliseconds.

2. Accuracy

Humans make mistakes. You might assume a field is boolean when it's actually string | null. Our tool scans the values and generates the most precise type definition possible.

Input JSON:

json{
  "id": 101,
  "tags": ["news", "tech"],
  "meta": null
}

Output TypeScript:

typescriptinterface RootObject {
  id: number;
  tags: string[];
  meta: any; // or null
}

3. Maintainability

When the backend changes the API response, don't update types by hand. Just paste the new JSON, generate the new interface, and replace the old file.

How to use the JSON to TypeScript Tool

1. Paste JSON: Copy your API response body.
2. Generate: The tool parses the structure.
3. Copy Code: Get a ready-to-use TypeScript interface or type definition.

Our tool handles: * Nested Objects: Recursively generates interfaces for deep structures. * Arrays: Detects types inside arrays (e.g., User[]). * Optional Fields: Smart detection of nullable fields (coming soon).

Ready to Code Faster?

Stop typing types. Generate them.