How to Convert Between Data Formats in Rust

Use the serde crate with serde_json to serialize and deserialize data between formats like JSON and Rust structs. Add serde and serde_json to your Cargo.toml, derive Serialize and Deserialize on your struct, then use serde_json::to_string and serde_json::from_str to convert.

use serde::{Serialize, Deserialize};

#[derive(Serialize, Deserialize)]
struct Data { value: i32 }

let d = Data { value: 42 };
let json = serde_json::to_string(&d).unwrap();
let parsed: Data = serde_json::from_str(&json).unwrap();

Converting between data formats in Rust translates your program's data into standard text formats like JSON and back again. It matters because it lets your application talk to web services, save settings to files, or share data with other programs. Think of it like translating a letter from your native language into English so someone else can read it, then translating it back when they reply.