👉 Encode a string to Base64 in Go

To encode a string to Base64 in Go, use the EncodeToString() function from the encoding/base64 standard library package. This function takes a byte slice and converts it to a Base64 encoded string, but it can also be used for a string argument by converting it to a byte slice.

Check also how to decode Base64 to a string in Go.

package main

import (
    "encoding/base64"
    "fmt"
)

func main() {
    text := "hello from gosamples.dev base64 encoding example!"
    encodedText := base64.StdEncoding.EncodeToString([]byte(text))
    fmt.Printf("Encoded text: %s\n", encodedText)
}

Output:

Encoded text: aGVsbG8gZnJvbSBnb3NhbXBsZXMuZGV2IGJhc2U2NCBlbmNvZGluZyBleGFtcGxlIQ==

The EncodeToString() is a method of StdEncoding which is an object representing the standard base64 encoding, as defined in RFC 4648.