🦀 JSON to Rust Struct Generator

JSON → Rust Struct · Serde Support · Option Types · Nested Structures

📥 Input JSON
💻 Generated Rust Code
// Enter JSON and click "Generate Rust Code"

❓ Frequently Asked Questions

What dependencies are needed?▼

Add to Cargo.toml: serde = { version = "1", features = ["derive"] } and serde_json = "1". The generated #[derive(Serialize, Deserialize)] annotations work directly with these crates.

Is my JSON data secure?▼

Yes. All processing is done locally in your browser. No data is uploaded to any server. You can safely process sensitive data like API keys or private configuration.

camelCase vs snake_case?▼

Enable snake_case to generate Rust-style field names (e.g., user_name). Enable camelCase to add #[serde(rename_all = "camelCase")], which maps between Rust snake_case fields and JSON camelCase keys automatically during serialization/deserialization.

How are nullable fields handled?▼

Fields with null JSON values are automatically mapped to Option<T>. You can also enable "Make all fields Option" to make every field nullable. Using #[serde(default)] together with Option allows missing fields to deserialize as None.

💡 All processing is done locally in your browser. Generated Rust code is ready for production.