JSON Tool
JSON to TypeScript
Generate TypeScript interfaces from JSON samples.
JSON to TypeScript
Convert JSON to TypeScript interfaces quickly for API integration work.
Overview
Paste a representative JSON payload to produce TypeScript interfaces you can reuse in frontend or backend API code.
Examples
Nested object to interfaces
Input
{"user":{"id":1,"name":"John","roles":["admin"]}}Output
interface User {
id: number;
name: string;
roles: string[];
}Primitive array inference
Input
{"tags":["api","tools"]}Output
interface RootObject {
tags: string[];
}Use cases
- Bootstrap API client model types quickly.
- Reduce manual typing mistakes in contracts.
- Align frontend and backend payload expectations.
FAQ
Does it support nested objects?
Yes. Nested objects generate separate interfaces.
How are arrays handled?
Array item type is inferred from the first value in the sample.
Can this replace full schema tooling?
No. It is a fast starter, not a full schema management system.
Do I need valid JSON input?
Yes. Invalid JSON cannot be converted.