Is JSON → Types free?

Yes, JSON → Types is completely free to use with no signup required.

Does JSON → Types send my data to a server?

No. JSON → Types runs entirely in your browser using client-side JavaScript. Your data never leaves your device.

DevTab

Paste JSON and generate a TypeScript interface, Pydantic model, Go struct, or Zod schema instantly, entirely client-side.

Never leaves your browser

Paste JSON, get a TypeScript interface, Pydantic model, Go struct, or Zod schema.

JSON

TypeScript output