Hex to Base64: Encode and Decode Bytes Online This converter translates hex values to base64 strings. The tool decodes the hex value into the original data, then encodes it to base64. You also have the option to group the hex string by half byte, byte, 2 bytes or 4 bytes before converting these chunks to base64. Use the above hex to base64 converter to translate hexadecimal numbers into base64 format. If this tool was helpful, tweet it or share it.