JSON to TypeScript Interface
LiveTurn JSON into a TypeScript interface.
All generated data is fictional and intended for development, testing, QA, prototyping, and automation only. Do not use it for fraud, impersonation, or illegal activity.
export interface Root {
id: number;
name: string;
active: boolean;
roles: string[];
profile: {
age: number;
country: string;
};
}
About this tool
Paste a JSON response from any API or LLM and get a ready-to-use TypeScript interface — ideal for typing fetch responses, tool outputs and structured AI payloads. Arrays of objects are merged so missing keys become optional.
How it works
- Paste a JSON object or array into the input.
- Optionally set the root type name.
- Copy the generated TypeScript interface — everything runs locally.
Example output
export interface Root {
id: number;
name: string;
active: boolean;
roles: string[];
profile: {
age: number;
country: string;
};
}