TS Interface Generator
FreeGenerate TypeScript interfaces from JSON or descriptions
interface Root {
id: number;
name: string;
active: boolean;
}About TS Interface Generator
Typing out a TypeScript interface by hand from a sample JSON payload is tedious and error-prone, especially when the object is deeply nested or has many fields. You end up guessing types, missing optional keys, or mistyping a property name. The TS Interface Generator builds interfaces straight from JSON or a description, so the shape of your data turns into accurate type definitions without the manual work.
Paste a JSON object or describe the structure, and the tool produces a matching TypeScript interface with inferred field types you can drop into your code. It runs entirely in the browser with no signup and no upload, so it is free, private, and instant. This is handy when integrating an API response, modeling a config object, or adding types to untyped data, giving you a reliable starting interface you can rename and tighten as needed.
Common uses
- Generate a TypeScript interface from a sample API response JSON
- Model a config or data object's shape without typing each field by hand
- Add types to previously untyped JSON data in your project
- Create a starting interface for a nested object structure quickly
- Convert example payloads into reusable type definitions
How to use
- 1
Configure options
Set your preferences using the options panel below.
- 2
Click Generate
Click the process button to generate your result instantly.
- 3
Copy or download
Copy the result to clipboard or download it directly to your device.
Why ToolHub?
- React and TypeScript ready
- Copy-paste components
- Markdown tools included
FAQ
Can it generate types from JSON?
Yes. Paste a JSON object and it infers field types to build a matching TypeScript interface.
Does it handle nested objects?
Yes. Nested structures are reflected in the generated interface so the full shape is typed.
Is my JSON sent anywhere?
No. Generation happens in your browser, so your data stays local and private.
What about optional or nullable fields?
The tool infers types from the sample you provide, so review the output and mark optional or nullable fields to match your real data.
Can I use TS Interface Generator on mobile?
Yes — ToolHub is fully responsive and works on iPhone, Android, tablets and all modern browsers. No app install needed.