Paste any JSON and get clean, ready-to-use TypeScript interfaces in one click. Nested objects, arrays and union types handled automatically — identical structures deduplicated into a single interface.
Convert JSON to TypeScript →{
"id": 1042,
"name": "Anjan",
"active": true,
"tags": ["dev", "k8s"],
"owner": {
"email": "[email protected]"
}
}interface Owner {
email: string;
}
interface Root {
id: number;
name: string;
active: boolean;
tags: string[];
owner: Owner;
}Hand-writing interfaces for large API payloads is slow and error-prone. Generating them from a real response gives you accurate types in seconds — autocomplete, compile-time safety and refactoring support with zero guesswork. If your JSON is broken (single quotes, trailing commas, Python literals), the built-in Fix & Analyze repairs it first, so even messy log output converts cleanly.
Yes — nested objects become their own interfaces, arrays are typed as T[], and mixed-type arrays become union types like (string | number)[].
No. Everything runs in your browser. Nothing is sent to any server.
Structurally identical objects are deduplicated — an array of 100 identical items produces one interface, referenced as Item[].
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