Free JSON to TypeScript Converter | Generate Interfaces | SkyBrance

What is JSON to TypeScript?

JSON to TypeScript conversion automatically generates TypeScript interfaces from JSON data. Instead of manually defining types for API responses, database records, or configuration objects, you can paste the JSON and get type-safe interfaces instantly.

This tool analyzes your JSON structure, infers the correct TypeScript types for each field, handles nested objects by creating separate interfaces, and detects arrays with their element types. The result is clean, exportable TypeScript code ready to use in your project.

Key Features

Smart Type Inference

Correctly infers string, number, boolean, arrays, nested objects, and nullable types.

Nested Object Support

Nested objects generate separate named interfaces for clean, reusable types.

Custom Root Name

Set a custom name for the root interface to match your project conventions.

Export Ready

All interfaces are exported and ready to paste into your .ts files.

Frequently Asked Questions

Does it handle nested JSON?

Yes. Each nested object creates a separate interface named after its key. For example, a field 'address' with nested properties generates an 'Address' interface.

What about arrays?

Arrays are typed based on their first element. An array of objects generates an interface for the object type. Empty arrays default to 'any[]'.

Can I use 'type' instead of 'interface'?

The tool generates interfaces by default as they support declaration merging and are the conventional choice for object shapes in TypeScript.

Is my data secure?

Yes. All conversion happens entirely in your browser. No JSON data is sent to any server.

About the JSON to TypeScript

The JSON to TypeScript is a free online tool that lets you generate TypeScript interfaces from JSON data. It runs entirely in your browser with no sign-up required, so you get instant results while your data stays on your device. It is built for developers, designers, and anyone who needs a fast, reliable json to typescript without installing software.

Frequently asked questions

Is the JSON to TypeScript free to use?

Yes. The JSON to TypeScript is completely free with no account, sign-up, or installation required.

Is my data private when I use the JSON to TypeScript?

This tool runs entirely in your browser. Your data is never uploaded to a server, which makes it safe to use with sensitive input.

Do I need to install anything?

No. The JSON to TypeScript works in any modern web browser on desktop or mobile, with nothing to download.

Can I use the JSON to TypeScript on mobile?

Yes. The tool is responsive and works on phones, tablets, and desktops.

Free Online JSON to TypeScript