Hex to Base64 conversion in Python

Question

I want to convert a simple HEX string such as 10000000000002ae to Base 64.

The hex string is to be converted to bytes, and the bytes are then encoded to base64 notation,

Answer 1

The tool you link to simply interprets the hex as bytes, then encodes those bytes to Base64.

Either use the binascii.unhexlify() function to convert from a hex string to bytes, or use the bytes.fromhex() class method. Then use the binascii.b2a_base64() function to convert that to Base64:

from binascii import unhexlify, b2a_base64

result = b2a_base64(unhexlify(hex_string))

or

from binascii import b2a_base64

result = b2a_base64(bytes.fromhex(hex_string))

In Python 2, you can also use the str.decode() and str.encode() methods to achieve the same:

result = hex_string.decode('hex').encode('base64')

In Python 3, you'd have to use the codecs.encode() function for this.

Demo in Python 3:

>>> bytes.fromhex('10000000000002ae')
b'\x10\x00\x00\x00\x00\x00\x02\xae'
>>> from binascii import unhexlify, b2a_base64
>>> unhexlify('10000000000002ae')
b'\x10\x00\x00\x00\x00\x00\x02\xae'
>>> b2a_base64(bytes.fromhex('10000000000002ae'))
b'EAAAAAAAAq4=\n'
>>> b2a_base64(unhexlify('10000000000002ae'))
b'EAAAAAAAAq4=\n'

Demo on Python 2.7:

>>> '10000000000002ae'.decode('hex')
'\x10\x00\x00\x00\x00\x00\x02\xae'
>>> '10000000000002ae'.decode('hex').encode('base64')
'EAAAAAAAAq4=\n'
>>> from binascii import unhexlify, b2a_base64
>>> unhexlify('10000000000002ae')
'\x10\x00\x00\x00\x00\x00\x02\xae'
>>> b2a_base64(unhexlify('10000000000002ae'))
'EAAAAAAAAq4=\n'