Convert byte array (or string) to a readable "\xFF" formatted string for any bytes outside the printable ascii range (32-127 decimal)

makeReadable.js

function makeReadable(bytes) {
    var readable = "", i;
    for (i = 0; i < bytes.length; i++) {
        var byteVal = bytes.charCodeAt(i);
        if (byteVal < 32 || byteVal > 127) {
            readable += "\\x" + ("0" + byteVal.toString(16).toUpperCase()).slice(-2);
        } else {
            readable += bytes[i];
        }
    }
    return readable;
}