JSON to TypeScript: Generate Interfaces & Type Definitions

Generate clean TypeScript interfaces and type definitions from sample JSON payloads. Handles nested objects, optional fields, and arrays.

Input

Output

export type RootResponse = RootResponseItem[];

export interface RootResponseItem {
  id: number;
  name: string;
  role: string;
  active: boolean;
}

How to Use JSON to TypeScript

Paste your input data in the editor below.
View the converted, formatted output updated in real-time.
Inspect any syntax or parsing error indications in the Error Panel.
Copy or download the transformed output with one click.

Practical Examples

Direct Transformation

Instant conversion between structured data formats.

Input:

{"id": 1, "name": "FormatFlow"}

Output:

Standardized target representation

Common Mistakes & Troubleshooting

Converting nested objects into CSV without flattening: CSV is 2D flat table format, while JSON supports arbitrary nesting.
Invalid XML tags: XML tags cannot contain spaces or begin with numbers.

Frequently Asked Questions

Is my data private and secure?

Yes! All conversions run 100% inside your browser using client-side JavaScript. No data is sent to our servers.