JSON to Rust Guide
Convert JSON to Rust structs instantly. Generate type-safe Rust structs with Serde derive macros from JSON samples. Use our free online tool to get started instantly.
What is JSON to Rust?
JSON to Rust is a free online tool that convert json to rust structs instantly. generate type-safe rust structs with serde derive macros from json samples. It processes everything locally in your browser, so your data never leaves your device. Whether you are a developer looking to streamline your workflow or a professional needing quick and reliable results, this tool delivers instant, privacy-focused functionality without requiring any sign-up or software installation.
How to Use JSON to Rust
Using JSON to Rust is straightforward. Follow these steps to get started:
Step 1: Paste your JSON
Copy your JSON data and paste it into the input textarea above.
Step 2: Configure options
Toggle nullable field detection for Option
Step 3: Copy the Rust code
Click Generate, then copy the Rust structs or download the .rs file.
Key Features of JSON to Rust
JSON to Rust comes with a range of features designed to make json tasks easier:
Serde Generation: Creates Rust structs with #[derive(Debug, Serialize, Deserialize)] and #[serde(rename)] attributes.
Type Inference: Automatically detects String, i64, f64, bool, Vec
Nested Structs: Creates separate struct definitions for nested objects with proper type references.
Local Processing: All conversion happens locally  your JSON never leaves your device.
Tips & Best Practices
Get the most out of JSON to Rust with these tips:
Use realistic sample data: Include all possible fields and edge cases (null values, empty arrays) in your sample JSON to generate the most complete struct definitions.
Review serde rename attributes: The #[serde(rename)] attributes map Rust field names back to JSON keys. Remove them if your Rust field names already match the JSON keys for cleaner code.
Frequently Asked Questions
What Rust version is targeted?
The generator targets Rust 2018+ with Serde 1.x. The generated code uses #[serde(rename)] attributes for field name mapping and standard type annotations.
How are null values handled?
When nullable detection is enabled, fields with null values are typed as Option<T>. Fields without null values are typed directly with no Option wrapper.
Is my JSON data sent to a server?
No. All conversion happens locally in your browser.