JSON to Rust Struct
Generate Rust structs with serde derives from sample JSON instantly.
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How to Generate Rust Structs from JSON
Paste a sample JSON document and the tool generates Rust struct definitions with serde derives, snake_case field names with rename attributes, and named nested types ready for serde_json::from_str.
Why Generate Serde Structs?
Rust's type system rewards precise struct definitions, but writing them by hand for large payloads is tedious. Generating from a real sample gets you a compiling starting point in seconds that you can refine with Options and enums.
Common Use Cases
Rust developers generate serde structs when consuming REST APIs, parsing configuration files, handling webhook payloads, and prototyping data pipelines with serde_json.
Frequently Asked Questions
Which serde attributes are generated?
Structs derive Debug, Serialize, and Deserialize. Fields are renamed to snake_case with #[serde(rename = "...")] attributes preserving the original JSON keys.
What types are inferred?
Whole numbers become i64, decimals become f64, strings become String, booleans become bool, and null values become Option<serde_json::Value>.
How are nested objects and arrays handled?
Nested objects become their own named structs, and arrays become Vec<T> of the inferred element type - or Vec<serde_json::Value> for mixed arrays.
Do I need any crates?
Add serde with the derive feature and serde_json to your Cargo.toml, and the generated code compiles as-is.