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CalcForge

JSON to Rust Converter

Emit Rust structs with serde-friendly field names from JSON examples.

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Serde-ready Rust from JSON

Rust JSON workflows center on serde structs with precise field names. CalcForge analyzes sample data and outputs struct definitions you can annotate with `Serialize` and `Deserialize`—ideal for CLI tools, Axum handlers, and config parsing.

Good fits

  • Bootstrapping API response types in Axum or Actix services
  • Creating config structs from example JSON settings files
  • Prototyping wasm or Tauri apps consuming JSON endpoints
  • Teaching serde mapping with concrete samples
JSON:
{"name":"Ada","active":true}

Rust:
#[derive(Serialize, Deserialize)]
struct Root {
    name: String,
    active: bool,
}

Practical notes

  • Add `#[serde(rename = "...")]` when JSON keys use camelCase and Rust fields use snake_case.
  • Optional fields often become `Option<T>`—adjust after comparing multiple samples.
  • Large integers may need `u64` or string newtypes—verify against production values.

Frequently asked questions

Are derive macros included?

Structs are emitted serde-ready; add `#[derive(Serialize, Deserialize)]` and crate imports in your project.

How are enums handled?

String constants map to `String` unless samples show a fixed set—define enums manually for safety.

Can I generate from JSON arrays at root?

Generate an item struct and use `Vec<Item>` as the root type in your module.

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