Private, ad-free JSON workspace

JSON Schema and Type Generator

Paste or import JSON to infer a reusable contract, then generate JSON Schema, TypeScript types, or Zod validators. It is built for developers turning API responses, webhook payloads, config files, and fixtures into safer code.

Why developers use it

  • Infer JSON Schema draft 2020-12 from sample JSON.
  • Generate TypeScript types from the same inferred schema.
  • Generate Zod validators for runtime validation workflows.
  • Copy or download generated contracts from a private browser workspace.

Common use cases

  • Creating TypeScript types from a new API response.
  • Drafting a JSON Schema for config files, webhook payloads, or fixtures.
  • Generating Zod validators before wiring untrusted JSON into an app.

Schema and type generation run in your browser, so source JSON is not uploaded to JSON Toolbox servers.

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FAQ

Can JSON Toolbox generate JSON Schema from JSON?

Yes. The schema tool infers a JSON Schema draft 2020-12 contract from valid JSON in the browser.

Can I generate TypeScript or Zod from JSON?

Yes. The schema workspace can generate TypeScript types and Zod validator code from the inferred JSON Schema.

Is schema generation private?

Yes. JSON parsing, schema inference, and type generation run locally in your browser.