JSON to TypeScript
Generate TypeScript interfaces from JSON.
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Input
TypeScript
export interface Root {
user: User;
tags: null;
}
export interface User {
id: number;
name: string;
active: boolean;
roles: string[];
meta: Meta;
}
export interface Meta {
lastLogin: string;
score: number;
}Converted successfully.
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What is a JSON to TypeScript?
Feeding a sample response to this generator produces TypeScript interfaces that describe it — nested objects become their own named types, arrays are inferred from their elements, and inconsistent keys become optional properties.
How to use the JSON to TypeScript
- Paste your data into the input panel, or load the sample.
- The result appears immediately — adjust the options if the tool offers any.
- Copy the output, or download it as a file.
JSON to TypeScript features
Interface generation
Nested types
Optional properties
One-click copy
Frequently asked questions
Is the JSON to TypeScript free?
Yes. The JSON to TypeScript is completely free, with no sign-up and no usage limits.
Is my data uploaded to a server?
No. Everything runs locally in your browser — your data never leaves your machine.
Does it work on mobile?
Yes. The JSON to TypeScript works in any modern browser on desktop, tablet and phone.
Can I use it offline?
Once the page has loaded, the JSON to TypeScript keeps working without a connection, because the processing happens in your browser.