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JSON → Types

Convert a JSON sample into TypeScript, Go, Python, Rust, and more — all in your browser.

Your data never leaves your device
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Frequently Asked Questions

  • Which languages are supported?

    TypeScript, TypeScript + Zod, Go, Python (Pydantic v2 or dataclasses), Rust (serde), Java, C#, Swift, Kotlin, Dart, Ruby, PHP, Elm, and JSON Schema.

  • Does my JSON upload anywhere?

    No. quicktype-core runs fully in your browser. We lazy-load the library (~900 KB gzipped) on first use to keep the page fast.

  • Can I rename the root type?

    Yes. Set "Root type name" above the input. Every nested type quicktype creates cascades from that root.