JSON to Rust
Free online JSON to Rust converter: generate serde structs with derives, snake_case fields, rename attrs and Vec<T>.
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What is JSON to Rust?
Rust's serde ecosystem requires precise struct definitions for JSON. This tool generates structs with #[derive(Serialize, Deserialize)] from a sample JSON: fields use snake_case, a #[serde(rename)] attribute is added whenever a name differs from the original key, integers map to i64, arrays to Vec<T>, and nested objects become separate structs.
How to Use
- Paste a sample JSON
- Rust structs are generated automatically
- Copy into your project (requires the serde and serde_json dependencies)
FAQ
- What does null map to?
- Option<serde_json::Value>. Replace it with Option<T> of a concrete type according to the documentation.
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Last updated 2026-09-04