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JSON Toolbox- Free online JSON tools

JSON to Rust

Convert JSON to Rust structs with serde online. Types are inferred for nested objects and arrays — and everything runs in your browser.

  • 100% client-side, nothing uploaded
  • Instant results
  • Works offline once loaded
Input JSON

Empty

Rust output

Empty

How it works

About this tool

This free online JSON to Rust generator turns a sample JSON payload into Rust structs with serde. Paste a representative response, set a root type name, and the tool infers a type for every field — including nested objects and array elements.

Every struct derives Serialize and Deserialize from serde. Field names are converted to snake_case with a #[serde(rename = "...")] attribute when needed, and optional or nullable fields use Option<T>.

Useful for quickly bootstrapping serde models from an example response in Rust API clients or services.

Generation runs entirely in your browser. Your JSON is never uploaded or stored, so it is safe to use with production API responses and payloads that contain sensitive data.

JSON Toolbox processes all data locally in the browser. Nothing is uploaded to a server.

Common questions

Frequently asked questions

How do I convert JSON to Rust?
Paste your JSON into the input editor and the generated Rust code appears on the right. Set a root type name to control what the top-level type is called, then copy or download the result.
Does it handle nested objects and arrays?
Yes. Nested objects become their own named types, and arrays are typed by their element. When objects in an array have slightly different shapes, their fields are merged and any field missing from some items is marked optional.
What should I know about the generated Rust code?
Serde attributes cover rename and Option; they do not add custom deserialize_with helpers. Untagged enums and complex polymorphic JSON usually need hand-written variants after generation.
Is my JSON uploaded anywhere?
No. The Rust code is generated locally in your browser. Nothing is sent to a server, logged, or stored — even for large or sensitive payloads.

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