JSON to types

Data

Generate TypeScript interfaces, Go structs, Python TypedDicts, or Rust serde structs from an example JSON document. All in your browser.

Target

JSON

Types

interface Root {
  id: number
  name: string
  active: boolean
  roles: string[]
  profile: Profile
}

interface Profile {
  city: string
  followers: number
}

Types are inferred from one example document — nested objects become named types, arrays use their first element. Optional fields and union types aren't inferred from a single sample; treat the output as a starting point. Runs entirely in your browser.