Convert JSON to Rust Serde Structs

Transform JSON payloads into Rust structs with Serde annotations and snake_case field mapping.

JSON to Rust Struct (Serde) Generator

Convert JSON data into Rust structs with #[derive(Serialize, Deserialize)] annotations.

JSON Input

Root Rust Struct Name

Generated Rust Structs (Serde)

use serde::{Deserialize, Serialize};

#[derive(Default, Debug, Clone, PartialEq, Serialize, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct CrateMetadata {
    pub id: i64,
    #[serde(rename = "crateName")]
    pub crate_name: String,
    #[serde(rename = "downloadsCount")]
    pub downloads_count: i64,
    #[serde(rename = "isPublished")]
    pub is_published: bool,
    #[serde(rename = "versionInfo")]
    pub version_info: VersionInfo,
    pub authors: Vec<String>,
}

#[derive(Default, Debug, Clone, PartialEq, Serialize, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct VersionInfo {
    #[serde(rename = "latestVersion")]
    pub latest_version: String,
    #[serde(rename = "editionYear")]
    pub edition_year: i64,
}

About This Tool

JSON to Rust Struct Generator converts JSON payloads into memory-safe Rust structs with Serde serialization derives (Serialize, Deserialize, Debug, Clone) and custom rename attributes.

Key Features

Full Serde Serialize/Deserialize derive support

Automatic camelCase to snake_case field renaming

Typed Vec<T>, Option<T>, i64, and f64 primitive mappings

How to Use This Tool

Paste your JSON payload into the input area.
Specify your root Rust struct name.
Copy the generated Rust code.

Why Use This Tool

Speed up Rust backend and Actix/Axum web service development.
Automatically maps camelCase JSON keys to idiomatic snake_case Rust fields with #[serde(rename = "...")].

Pro Tips

Add serde = { version = "1.0", features = ["derive"] } to your Cargo.toml dependencies

Frequently Asked Questions

What derives are included on generated structs?

Structs include #[derive(Default, Debug, Clone, PartialEq, Serialize, Deserialize)] for full standard library ergonomics.

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