Free online JSON to Rust converter. Paste JSON and generate Rust struct definitions with serde Serialize/Deserialize derive attributes, rename annotations, and nested structure support. 100% browser-based with zero uploads.
100% browser-based — your data never leaves your device
Convert JSON to Rust structs instantly. Generate type-safe Rust structs with Serde derive macros from JSON samples.
Copy your JSON data and paste it into the input textarea above.
Toggle nullable field detection for Option<T> generation.
Click Generate, then copy the Rust structs or download the .rs file.
Drop a file here or click to browse
Ctrl+Enter to generate
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JSON to Rust is a free online json tool that convert json to rust structs instantly. generate type-safe rust structs with serde derive macros from json samples. It works entirely in your browser — no downloads, no installations, and no server uploads required. backend developers, frontend engineers, DevOps engineers use JSON to Rust when they need a fast, privacy-respecting way to process json data without installing additional software. It supports capabilities such as serde generation, type inference, nested structs. Additional features include local processing. Common use cases include generating rust struct types from api response json for type-safe http clients, creating serde-compatible structs from sample configuration files and data structures, rapid prototyping of rust data models from mock json data. All processing happens locally using modern browser APIs, which means your data never leaves your device. This makes JSON to Rust ideal for working with sensitive data, proprietary code, or any situation where privacy matters.
JSON to Rust Struct Generator is a free online json tool that helps you convert json to rust structs instantly. generate type-safe rust structs with serde derive macros from json samples. Key capabilities include serde generation, type inference, nested structs. All processing is done locally in your browser — no data is uploaded, stored, or shared with any server. There are no sign-ups, no file size limits, and no hidden charges. It is commonly used to generating rust struct types from api response json for type-safe http clients.
Copy your JSON data and paste it into the input textarea above.
Toggle nullable field detection for Option<T> generation.
Click Generate, then copy the Rust structs or download the .rs file.
| Category | Details |
|---|---|
| Input Limits | Maximum file size: Browser memory bound (~2 GB) |
| Nesting depth: Unlimited (browser stack limit) | |
| Supported Formats | JSON, JSONC (with comments), JSON5 (extended syntax) |
| Browser Engine |
|
All operations run entirely in your browser using built-in JSON APIs. No server uploads, no data storage, and no third-party requests.
JSON to Rust is ideal when you need to generating rust struct types from api response json for type-safe http clients without installing software or uploading data to a server. Since everything runs in your browser, there is no setup time and no risk of your data being stored on external servers. For for persistent editing environments with linting, consider using VS Code with JSON extension. For for server-side JSON processing in scripts, jq (command-line) may be a better fit. JSON to Rust fills the gap between heavyweight desktop tools and insecure online services that require uploading your data.
No. JSON to Rust processes everything entirely in your browser using JavaScript. Nothing you type, paste, or upload is ever transmitted to any server. Your data never leaves your device.
The generator targets Rust 2018+ with Serde 1.x. The generated code uses #[serde(rename)] attributes for field name mapping and standard type annotations.
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.
Creates Rust structs with #[derive(Debug, Serialize, Deserialize)] and #[serde(rename)] attributes.
Automatically detects String, i64, f64, bool, Vec<T>, and Option<T> types from your JSON data.
Creates separate struct definitions for nested objects with proper type references.
All conversion happens locally — your JSON never leaves your device.
JSON to Rust Struct Generator is useful in a variety of scenarios across different workflows:
Generating Rust struct types from API response JSON for type-safe HTTP clients
Creating Serde-compatible structs from sample configuration files and data structures
Rapid prototyping of Rust data models from mock JSON data
Include all possible fields and edge cases (null values, empty arrays) in your sample JSON to generate the most complete struct definitions.
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.
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