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JSON to Rust Struct Converter - Convert JSON to Rust Online Free | DevToolBox

Convert JSON to Rust structs with serde derive macros online free. Generate typed Rust struct definitions from JSON data. Instant conversion in your browser.

About JSON to Rust Conversion

Rust's type system requires defining structs before deserializing JSON data with serde. Manually writing Rust structs for complex JSON APIs is time-consuming. This tool analyzes your JSON and generates Rust struct definitions with proper types (String, i64, f64, bool, Vec<T>), serde derive macros (Serialize, Deserialize, Debug, Clone), and automatic snake_case field naming with #[serde(rename)] attributes when needed. Nested objects become separate named structs, and null values are wrapped in Option<T>. All processing happens in your browser.

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How to Use

  1. Paste your JSON data into the input panel
  2. Set the root struct name and derive options
  3. Click Convert to generate Rust structs
  4. Copy the structs into your Rust project

Common Use Cases

  • Creating Rust structs from REST API responses
  • Building typed models for Actix-web or Axum servers
  • Generating serde-compatible types from JSON configs
  • Quickly scaffolding Rust data models from sample data

Frequently Asked Questions

How do I convert JSON to Rust structs?
Paste your JSON, set the root struct name, select derive macros, and click Convert. The tool generates Rust structs with proper types and serde attributes.
What derive macros are available?
You can toggle Debug, Clone, Serialize, and Deserialize. The serde import is added automatically when Serialize or Deserialize is selected.
How are field names handled?
Field names are converted to snake_case. If the original JSON key differs, a #[serde(rename = "originalKey")] attribute is added.
How are null values handled?
Fields with null values are typed as Option<String>. This allows the field to be None when the value is null in JSON.