JSON to Rust Struct Converter

Instantly transform JSON payloads into type-safe, idiomatic Rust structs with Serde derives, custom attributes, and ready-to-copy Cargo.toml dependencies.

At a glance

JSON to Rust Struct Converter is a free browser tool that converts JSON to idiomatic Rust structs online with Serde Serialize and Deserialize derives, Option handling, and Cargo.toml. It correctly maps 64-bit integers (i64), floats (f64), booleans, nested structs, and homogeneous/heterogeneous vectors. Processing happens entirely on your device — nothing is uploaded and no account is required.

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100% Client-Side In-Browser JSON to Rust Struct Converter

Generate type-safe, idiomatic Rust structs with Serde Serialize and Deserialize derives. Zero network transmissions, 100% private in browser memory.

Local & Private Instant Conversion
Derives:
JSON Input 0 chars
Generated Rust Structs serde 
// Paste JSON on the left to generate Rust structs
0 lines • 0 characters
Rust Serde 1.0 Compatible
Cargo.toml Dependencies serde + serde_json 
[dependencies]
serde = { version = "1.0", features = ["derive"] }
serde_json = "1.0"
Schema Inspector Root: Root
Structs Created 0
Total Fields 0
Max Depth 0
Serde Rename Auto

Why Use This JSON to Rust Struct Converter?

Idiomatic Rust Struct Generation: Transforms complex, nested JSON objects into clean, strongly typed Rust structs with pub fields.
Customizable Serde Derives: Pre-configures Serialize, Deserialize, Debug, Clone, PartialEq, and Default derives.
Automatic Keyword Sanitization: Detects reserved Rust keywords like type, ref, match and applies r# prefix with Serde rename attributes.
Smart Type Inference: Correctly maps 64-bit integers (i64), floats (f64), booleans, nested structs, and homogeneous/heterogeneous vectors.
Cargo.toml Dependency Drawer: Provides instant copy-paste access to exact serde and serde_json dependency blocks.
100% Client-Side Privacy: All parsing and code generation execute strictly within browser memory with zero network transmissions.

How to Use JSON to Rust Struct Converter

1

Paste Your JSON

Copy a JSON payload from an API response, database query, or file and paste it into the left editor.

2

Configure Rust Options

Choose your root struct name, custom derives (Serialize, Deserialize, Debug, Clone), and field visibility.

3

Copy Rust Structs & Dependencies

Click 'Copy' to copy the generated Rust code or download as a .rs file, and copy the Cargo.toml dependencies.

Worked example: JSON to Rust Struct Converter

Executed entirely inside your local browser memory using modern Web APIs. The engine verifies input syntax, performs deterministic transformation, and exposes instant copy or download options.

Sample JSON Data Source 
sample_payload.json (Valid format conforming to JSON specification)
Resulting RUST Output Processed 
converted_result.rust (100% client-side)

Technical Specifications & Engine Details

Technical specifications and engine details for JSON to Rust Struct Converter
Specification Details
Supported Formats JSON, TEXT → RUST, RS, TEXT
Execution Mode 100% Client-Side In-Browser (client)
Browser Requirements Requires modern web browser with ECMAScript 6+ and standard DOM Web APIs.
Performance Constraints Client browser memory limit (typically 1–2 GB RAM); processing speed depends on local device CPU.
Maintained by Pragyan Pahadi

100% Client-Side Privacy Guarantee

All JSON parsing, recursive type mapping, and Rust struct generation run 100% locally in your browser memory. No payload data is ever sent to external servers.

Frequently Asked Questions

How does this tool convert JSON to Rust structs?
Simply paste your JSON into the left panel. The client-side engine parses the syntax, recursively infers data types, detects nested objects, and emits idiomatic Rust structs with Serde attributes on the right.
What Serde derives and attributes are supported?
By default, structs include #[derive(Default, Debug, Clone, PartialEq, Serialize, Deserialize)]. When JSON field names use camelCase or special characters, #[serde(rename = "...")] attributes are generated automatically.
How are Rust reserved keywords like 'type' handled?
When a JSON key is a reserved keyword such as 'type', 'match', or 'ref', the generator uses Rust's raw identifier syntax (e.g. pub r#type: String) along with #[serde(rename = "type")] to preserve wire-compatibility without syntax errors.
What dependencies do I need in Cargo.toml?
You need serde with the derive feature enabled and serde_json. Our Cargo.toml drawer gives you the exact snippet: serde = { version = "1.0", features = ["derive"] } and serde_json = "1.0".

Methodology

This tool runs entirely in your browser. The example above shows a representative input and the result it produces.

Last updated .

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