JSON to TypeScript — Generate Interfaces from JSON

Convert JSON data to TypeScript interfaces automatically. Supports nested objects, arrays, and multiple interface generation.

Root name

JSON Input

TypeScript Output

interface Root {
  id: number;
  name: string;
  email: string;
  isActive: boolean;
  age: number;
  address: Address;
  tags: string[];
  orders: OrdersItem[];
}

interface OrdersItem {
  id: number;
  total: number;
  items: number;
}

interface Address {
  street: string;
  city: string;
  zip: string;
}

JSON to TypeScript Conversion

This tool analyzes JSON data and generates corresponding TypeScript interfaces. It infers types from values (string, number, boolean), handles nested objects as separate interfaces, and detects array item types.

When to Use This

Use this when integrating with APIs — paste a JSON response to instantly get TypeScript types. This saves time and ensures type safety when working with external data sources.

About This Tool

The JSON to TypeScript is a free online tool available on CodeUtilo. Generate TypeScript interfaces from JSON data automatically. All processing happens directly in your browser — no data is ever sent to any server, ensuring your privacy and security. No signup or installation is required.

Key Features

Browser-Based Processing — All json to typescript operations run locally in your browser using JavaScript. Your data never leaves your device.
Instant Results — Get results immediately as you type or paste your input. No waiting for server responses or page reloads.
Free & No Signup — Use the json to typescript as many times as you need without creating an account or paying anything.
Mobile Friendly — Works on desktop, tablet, and mobile browsers. Access this tool from any device with an internet connection.

Common Use Cases

Using the json to typescript for day-to-day development tasks
Saving time on repetitive tasks by using a browser-based tool instead of writing custom code
Working on projects where installing software is not an option (school, work, shared computers)
Quick prototyping and debugging without switching to a terminal or IDE
Sharing the tool link with colleagues who need the same functionality

How to Use

Enter your input in the text area provided and the json to typescript will process it instantly. Use the Copy button to copy the result to your clipboard. All operations are performed locally in your browser — no data is transmitted to any server.

Frequently Asked Questions

Is the JSON to TypeScript free to use?

Yes, the JSON to TypeScript is completely free with no usage limits. There is no signup or registration required. You can use it as many times as you need.

Is my data safe when using this tool?

Yes. All processing happens locally in your browser using JavaScript. Your data is never uploaded to any server or stored anywhere. Everything stays on your device.

Does this tool work on mobile devices?

Yes. The JSON to TypeScript is fully responsive and works on smartphones, tablets, and desktop computers. You can use it from any modern browser on any device.

Do I need to install anything?

No. The JSON to TypeScript runs entirely in your web browser. There is nothing to download or install. Just open the page and start using it immediately.

Related Tools

JSON Formatter

Format, validate, and beautify JSON data with syntax highlighting.

JSON to CSV Converter

Convert JSON arrays to CSV format and CSV back to JSON.

JSON Path Finder

Extract all paths from a JSON object. Filter and copy JSONPath expressions.

Workflow Links

Suggested step-by-step tools based on this page intent.

Before This Tool

JSON Schema GeneratorGenerate JSON Schema from any JSON data. Auto-detect formats like email, URI, date, UUID.JSON FormatterFormat, validate, and beautify JSON data with syntax highlighting.JSON Path FinderExtract all paths from a JSON object. Filter and copy JSONPath expressions.

Next Step Tools

JSON Schema ValidatorValidate JSON data against a JSON Schema. Check types, required fields, and constraints.YAML ValidatorValidate YAML syntax online. Find errors with line numbers and see parsed JSON output.JSON DiffCompare two JSON objects and highlight added, removed, and modified keys.