How to use: JSON to TypeScript
JSON to TypeScript is a free online Data Conversion Tools tool that generate TypeScript interfaces from a JSON sample, including nested objects and arrays instantly in your browser. Paste your data, adjust the options and get the result in real time — no installation, no sign-up, and nothing is ever uploaded to a server.
Description
Generate TypeScript interfaces from a JSON sample, including nested objects and arrays.
- Data Conversion Tools
- Because everything is computed client-side, JSON to TypeScript is safe to use with sensitive data such as API keys, tokens or private logs.
How to use
Using JSON to TypeScript takes three steps:
- Paste your data into the input box (or load the example).
- Configure the options to match your target format or scenario.
- Copy, download or inspect the output — it updates live as you type.
Run
Examples
Emits a TypeScript interface with nested object and array element types.
Input
{"id":42,"title":"Hello","tags":["a","b"],"author":{"name":"Ada","email":"ada@example.com"}}
Output
export interface Root {
id: number;
title: string;
tags: string[];
author: Record<string, unknown>;
}
This output was produced by actually running the tool, not written by hand.
Use cases
Common situations where JSON to TypeScript helps:
- Generate TypeScript interfaces from a JSON sample, including nested objects and arrays.
Parameters
This tool has no options — it works on the input alone.
FAQ
What is JSON to TypeScript?
JSON to TypeScript generate TypeScript interfaces from a JSON sample, including nested objects and arrays. It runs entirely in your browser, so your data stays private.
Is JSON to TypeScript free to use?
Yes. JSON to TypeScript is free, unlimited and works without registration or installation.
Does my data get uploaded?
No. All processing happens locally in your browser; nothing is sent to any server.
Good to know
- Everything runs client-side, so extremely large inputs are limited by your browser tab’s memory rather than by a server upload limit.