How to use base64 crate in Rust encoding

Use the base64 crate by adding it to your Cargo.toml and importing the Engine trait to encode or decode strings.

use base64::{Engine as _, engine::general_purpose};

fn main() {
    let text = "Hello, world!";
    let encoded = general_purpose::STANDARD.encode(text);
    let decoded = general_purpose::STANDARD.decode(encoded).unwrap();
    println!("Original: {}", text);
    println!("Encoded: {}", encoded);
    println!("Decoded: {}", String::from_utf8(decoded).unwrap());
}

Add this to your Cargo.toml:

[dependencies]
base64 = "0.22"

The base64 crate lets you convert regular text into a special format that is safe to send over the internet or store in systems that only handle simple characters. Think of it like translating a secret message into a code that looks like random letters and numbers, then translating it back when you need to read it again. You use it whenever you need to safely transmit binary data or text through channels that might corrupt or block standard characters.