The example below shows to how to encode and then subsequently decode a string using base 64. Doing this has many uses, one of which to safely encode byte data in structures like JSON.

We use the encoding/base64 package to do this, which takes in and returns a byte array into it’s EncodeToString

package main

import (
    "encoding/base64"
    "fmt"
)

func main() {

    myString := "This is golangcode.com testing base 64!"

    // Encode
    encodedString := base64.StdEncoding.EncodeToString([]byte(myString))
    fmt.Printf("Encoded: %s\n", encodedString)

    // Decode
    raw, err := base64.StdEncoding.DecodeString(encodedString)
    if err != nil {
        panic(err)
    }

    fmt.Printf("Decoded: %s\n", raw)
}