How to convert from Hex to ASCII in JavaScript

Question

How to convert from Hex string to ASCII string in JavaScript   Ex        32343630 it will be 2460

User · Answer

x000D   x000D  console log  x000D   x000D   68656c6c6f20776f726c6421  match    1 2  g  reduce  acc char   gt acc String fromCharCode parseInt char  16       x000D   x000D    x000D   x000D   x000D

User · Answer

function hex2a hexx        var hex   hexx toString     force conversion     var str           for  var i   0   i  lt  hex length  amp  amp  hex substr i  2       00    i    2          str    String fromCharCode parseInt hex substr i  2   16        return str    hex2a  32343630       returns  2460

User · Answer

Another way to do it  if you use Node js   var input     32343630   const output   Buffer from input   hex    log input    quot  - gt   quot    output       Result  32343630 - gt  2460

User · Answer

I found a useful function present in web3 library   var hexString    0x1231ac  string strValue   web3 toAscii hexString

User · Answer

I ve found that the above solution will not work if you have to deal with control characters like 02  STX  or 03  ETX   anything under 10 will be read as a single digit and throw off everything after  I ran into this problem trying to parse through serial communications  So  I first took the hex string received and put it in a buffer object then converted the hex string into an array of the strings like so   buf   Buffer from data   hex    l   Buffer byteLength buf  hex    for  i 0  i lt l  i          char   buf toString  hex   i  i 1       msgArray push char        Then  join it  message   msgArray join        then I created a hexToAscii function just like in  Delan Azabani s answer above     function hexToAscii str       hexString   str      strOut               for  x   0  x  lt  hexString length  x    2                strOut    String fromCharCode parseInt hexString substr x  2   16                  return strOut          then called the hexToAscii function on  message   message   hexToAscii message     This approach also allowed me to iterate through the array and slice into the different parts of the transmission using the control characters so I could then deal with only the part of the data I wanted  Hope this helps someone else

User · Answer

for Hexa to String    let input     32343630     Note   let output   new Buffer input   hex        this is deprecated  let buf   Buffer from input   hex    let data   buf toString  utf8

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An optimized version of the implementation of the reverse function proposed by  michieljoris  according to the comments of  Beterraba and  Mala     x000D   x000D  function a2hex str    x000D    var hex       x000D    for  var i   0  l   str length  i  lt  l  i      x000D      var hexx   Number str charCodeAt i   toString 16   x000D      hex     hexx length  gt  1  amp  amp  hexx     0    hexx   x000D      x000D    return hex  x000D    x000D  alert a2hex  2460        display 32343630 x000D   x000D   x000D

User · Answer

For completeness sake the reverse function   function a2hex str      var arr         for  var i   0  l   str length  i  lt  l  i           var hex   Number str charCodeAt i   toString 16       arr push hex         return arr join        a2hex  2460      returns 32343630

User · Answer

You can use this     x000D   x000D  var asciiVal    32343630  match    1 2  g  map function v   x000D        return String fromCharCode parseInt v  16    x000D         join      x000D       x000D  document write asciiVal   x000D   x000D   x000D

[javascript] How to convert from Hex to ASCII in JavaScript?

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