JSON → TYPESCRIPT INTERFACES

Paste a JSON object or array and instantly get TypeScript interfaces, type aliases, or Zod schemas. Real-time generation — no backend, no data sent anywhere.

Root name

Style

null as

Nesting

JSON INPUT

// Output will appear here

HOW IT WORKS

Objects

Each nested object becomes a named interface

Arrays

Typed from the first element; empty arrays → unknown[]

null fields

Either T | null (union) or optional field (depends on setting)

Zod tab

Generates z.object() schemas compatible with Zod v3/v4