Convert String with Hex Ascii Codes to Characters

Convert string with hex ASCII codes to characters

You can use Array#pack:

["666f6f626172"].pack('H*')
#=> "foobar"

H is the directive for a hex string (high nibble first).

Convert from ASCII string encoded in Hex to plain ASCII?

A slightly simpler solution:

>>> "7061756c".decode("hex")
'paul'

Convert ASCII hex codes to character in mixed string

Quick and dirty:

    static void Main(string[] args)
    {
        Regex regex = new Regex(@"\\x[0-9]{2}");
        string s = @"Hello\x26\x2347World";
        var matches = regex.Matches(s);
        foreach(Match match in matches)
        {
            s = s.Replace(match.Value, ((char)Convert.ToByte(match.Value.Replace(@"\x", ""), 16)).ToString());
        }
        Console.WriteLine(s);
        Console.Read();
    }

And use HttpUtility.HtmlDecode to decode the resulting string.

Javascript hexadecimal to ASCII with latin extended symbols

First an example solution:

let demoHex = `0053007400720069006E006700200068006100730020006C0065007400740065007200730020007700690074006800200064006900610063007200690074006900630073003A0020010D002C00200161002C00200159002C0020002E002E002E`;

function hexToString(hex) {
    let str="";
    for( var i = 0; i < hex.length; i +=4) {
       str += String.fromCharCode( Number("0x" + hex.substr(i,4)));
    }
    return str;
}
console.log("Decoded string: %s", hexToString(demoHex) );

Convert a hex string in ASCII to the same hex values using Perl

Use pack 'H*', $key.

From perldoc -fpack:

h  A hex string (low nybble first).
H  A hex string (high nybble first).

Here is some output from the shell:

$perl -E'print pack "H*","42dc3f74212c4e74bab2"' | hd
00000000  42 dc 3f 74 21 2c 4e 74  ba b2                    |B.?t!,Nt..|
0000000a

How to convert a hex list to a list of ASCII values?

This will convert from to a list of bytes to ASCII, but 0x80 is invalid ASCII character code. See below:

ct = '0x790x760x7d0x7d0x80'
hex_list = ct.split('0x')
ascii_values=[]
for i in hex_list:
    print(i)
    if i != '':
        try:
            bytes_object = bytes.fromhex(i)
            ascii_string = bytes_object.decode("ASCII")
            ascii_values.append(ascii(ascii_string))
        except UnicodeDecodeError:
            print('Invalid ASCII... skipping...')
print(ascii_values)

See the answer here regarding 0x80.

Convert from ASCII to Hex in Python

str.encode(s) defaults to utf8 encoding, which doesn't give you the byte values needed to get the desired output. The values you want are simply Unicode ordinals as hexadecimal values, so get the ordinal, convert to hex and join them all together:

s = 'D`Cزف³›'
h = ''.join([f'{ord(c):x}' for c in s])
print(h)

446043632641b3203a

Just realize that Unicode ordinals can be 1-6 hexadecimal digits long, so there is no easy way to reverse the process since you have no spacing of the numbers.

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