About the JSON to Rust Struct Converter
Manually writing Rust structs and Serde annotations for large API responses is a tedious and error-prone process. Our JSON to Rust Converter automates this workflow, allowing developers to instantly transform raw JSON payloads into clean, production-ready Rust struct definitions compatible with serde_json.
Why use this tool?
- 100% Client-Side Privacy: We respect your data. This tool runs entirely in your web browser using local JavaScript. Your sensitive API payloads and internal data structures are never sent to an external server.
- Lightning Fast: Because processing happens locally on your device, conversions are instantaneous, with zero network latency.
- Serde Ready: Automatically applies
#[derive(Serialize, Deserialize)]macros to your structs and handles JSON key renaming seamlessly. - Accurate Type Inference: The generator intelligently analyzes your JSON values to assign the correct Rust types (e.g.,
i64,f64,String,bool,Vec<T>, or custom nested structs).
How to convert JSON to Rust
- Paste your valid JSON object or array into the input editor.
- The tool will automatically parse the syntax in real-time.
- Copy the generated Rust structs from the output window and paste them directly into your Cargo project.
Frequently Asked Questions
Does this tool support JSON arrays?
Yes, if you provide an array of JSON objects, the tool will analyze the first object to construct the base struct layout and use Vec<T> where necessary.
Does it map snake_case to camelCase?
Yes! Rust strictly enforces snake_case for struct fields. The generator will convert your JSON keys to snake_case and automatically add a #[serde(rename = "origName")] attribute so serialization continues to work perfectly.
Is the tool free to use?
Completely free. There are no usage limits, paywalls, or accounts required to use the CrispyTools JSON to Rust converter. Your data remains private and local to your machine.