JSON to Rust Struct Converter

JSON to Rust Struct Converter | Online Free Tool | Elysia Tools

Tool usage guide

Learn when to use this tool, what it supports, and how real users apply it.

Key facts

Category: Development
Input types: textarea, text, checkbox
Output type: text
Sample coverage: 4
API ready: Yes

Overview

The JSON to Rust Struct Converter instantly transforms JSON payloads into strongly typed Rust structures. It automatically generates serde serialization and deserialization derives, converts field names to idiomatic snake_case, and appends serde rename attributes to preserve original JSON keys during API communication.

When to use

When integrating external REST APIs in Rust and needing to define strongly typed Data Transfer Objects (DTOs).
When parsing configuration files or JSON payloads into Rust structs using the serde library.
When migrating legacy JavaScript or TypeScript codebases to Rust and translating interface definitions.

How it works

1Paste your raw JSON payload into the JSON Input text area.
2Specify the Root Type Name and choose whether to wrap fields in Option to handle nullable or missing values.
3Copy the generated Rust structs, which include Serialize, Deserialize, and serde rename attributes.

Use cases

Generating Rust structs for complex API responses from third-party services like Stripe or GitHub.
Creating configuration structs for parsing local config.json files.
Speeding up backend development by converting frontend JSON payloads into Rust DTOs.

Examples

1. Generating User Profile Structs

Backend Developer

Background

A developer is building a Rust web service that consumes user profile data from an external authentication provider.

Problem

Manually writing Rust structs with correct Serde attributes for a nested user profile JSON is tedious and error-prone.

How to use

Paste the user profile JSON into the input, set the Root Type Name to 'UserProfile', and run the converter.

Root Type Name: UserProfile, Wrap with Option: false

Outcome

Generates a clean UserProfile struct along with nested structs, all deriving Serialize and Deserialize with correct serde(rename) attributes.

2. Handling Optional API Fields

Systems Engineer

Background

An engineer is parsing telemetry data where many fields can be null or omitted entirely.

Problem

Parsing missing fields in Rust causes deserialization errors unless fields are wrapped in Option.

How to use

Paste the telemetry JSON payload, check the 'Wrap with Option' option, and set the Root Type Name to 'TelemetryData'.

FAQ

Does the converter support nested JSON objects?

Yes, it recursively generates nested Rust structs for all child objects found in the JSON payload.

How does it handle camelCase or kebab-case JSON keys?

It converts them to idiomatic Rust snake_case and adds a #[serde(rename = "...")] attribute.

Can I make all fields optional in the generated structs?

Yes, enabling the 'Wrap with Option' setting wraps struct fields in Rust's Option type.

Which Serde traits are derived by default?

The generated structs derive both Serialize and Deserialize traits.

Does it support JSON arrays?

Yes, JSON arrays are converted into Rust Vec collections containing the corresponding type.

Root Type Name: TelemetryData, Wrap with Option: true

Run this tool

Inputs

Result

Examples that match this tool

Continue with connected tools and hubs

Inputs

Result

Learn when to use this tool, what it supports, and how real users apply it.

Key facts

Overview

When to use

How it works

Use cases

Examples

1. Generating User Profile Structs

2. Handling Optional API Fields

FAQ

Web Data Serialization Rust Samples

Terraform Plan JSON Samples

Chat Transcript JSON Samples

JSON Samples

Data URI Generator

JSON Schema to Zod Schema Converter

JSON to C# Class Converter

JSON to Go Struct Converter

JSON to Typed Code Generators (TypeScript, Go, Rust, Kotlin, Java, C#)

JSON Interchange and Format Translation Tools

JSON Inspection, Diff, and Transformation Tools

JSON Schema, Mock Data, and API Fixture Generators