JSON to TypeScript
JSONGenerate TypeScript interfaces from JSON data
All processing happens locally in your browser — your data never leaves your machine.
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Examples
Simple Object
Input
{"name": "John", "age": 30, "active": true}Output
interface RootObject {
name: string;
age: number;
active: boolean;
}Nested Object
Input
{"user": {"name": "Jane", "roles": ["admin", "user"]}}Output
interface User {
name: string;
roles: string[];
}
interface RootObject {
user: User;
}Frequently Asked Questions
- How are nested objects handled?
- Nested objects are converted to separate TypeScript interfaces with proper references. Arrays are typed based on their contents, including union types when array elements differ.
- Can I customize the generated types?
- The generator produces clean TypeScript interfaces with proper naming. You can copy the output and customize it further in your editor.