Parse JSON data and generate clean, type-safe TypeScript interfaces or type aliases recursively. Supports optional fields, readonly modifiers, and custom root names.
Runs entirely in your browser
Turning a JSON response into TypeScript types by hand is repetitive and easy to get wrong for nested or optional fields. This generator parses JSON and produces clean, type-safe TypeScript interfaces or type aliases, recursively handling nested objects and arrays, with support for optional fields, readonly modifiers and a custom root name.
Accurate types from real data give you compile-time safety when consuming an API — mistyped property names and wrong shapes are caught before runtime. Generating them from an actual response is faster and more reliable than writing them from documentation that may be incomplete.
It runs in your browser, so your data is not uploaded. Use it to type an API response, model a JSON config, or scaffold interfaces from example data.
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