The HTML character encoder converts all ASCII characters to their corresponding HTML special characters. Each character has a special meaning, and each converted special character code conveys the original message of that character.
$str = 'VGhpcyBpcyBhbiBlbmNvZGVkIHN0cmluZw=='; echo base64_decode($str);
var str = 'VGhpcyBpcyBhbiBlbmNvZGVkIHN0cmluZw=='; console.log(atob(str));
var str = 'VGhpcyBpcyBhbiBlbmNvZGVkIHN0cmluZw=='; byte[] data = System.Convert.FromBase64String(str); var result = System.Text.ASCIIEncoding.ASCII.GetString(data);
You can easily decode Base64 encoded string using this online tool. To decode just enter encoded string into the textbox provided and press decode button.
You can also check similar Base64 Encode tool.