Convert JSON to Rust structs instantly. Generate type-safe Rust structs with Serde derive macros from JSON samples.
Copy your JSON data and paste it into the input textarea above.
Toggle nullable field detection for Option<T> generation.
Click Generate, then copy the Rust structs or download the .rs file.
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JSON to Rust Struct Generator is a free online tool that helps you convert json to rust structs instantly. generate type-safe rust structs with serde derive macros from json samples. With Serde Generation: creates rust structs with #[derive(debug, serialize, deserialize)] and #[serde(rename)] attributes. Type Inference: automatically detects string, i64, f64, bool, vec
JSON to Rust processes everything on your device, eliminating the need for server uploads or software installation. This approach is particularly useful for generating rust struct types from api response json for type-safe http clients creating serde-compatible structs from sample configuration files and data structures. Whether you need serde generation or more advanced json operations, JSON to Rust delivers reliable results without compromising on security or performance.
The generator targets Rust 2018+ with Serde 1.x. The generated code uses #[serde(rename)] attributes for field name mapping and standard type annotations.
When nullable detection is enabled, fields with null values are typed as Option<T>. Fields without null values are typed directly with no Option wrapper.
No. All conversion happens locally in your browser.
Creates Rust structs with #[derive(Debug, Serialize, Deserialize)] and #[serde(rename)] attributes.
Automatically detects String, i64, f64, bool, Vec<T>, and Option<T> types from your JSON data.
Creates separate struct definitions for nested objects with proper type references.
All conversion happens locally  your JSON never leaves your device.
JSON to Rust Struct Generator is useful in a variety of scenarios across different workflows:
Generating Rust struct types from API response JSON for type-safe HTTP clients
Creating Serde-compatible structs from sample configuration files and data structures
Rapid prototyping of Rust data models from mock JSON data
Include all possible fields and edge cases (null values, empty arrays) in your sample JSON to generate the most complete struct definitions.
The #[serde(rename)] attributes map Rust field names back to JSON keys. Remove them if your Rust field names already match the JSON keys for cleaner code.
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