Decodes a password from HeidiSQL. HeidiSQL passwords can be found in the registry. Use File -> Export Settings to dump all settings. Great for if you forget a password.

HeidiDecode.js

function heidiDecode(hex) {
    var str = '';
    var shift = parseInt(hex.substr(-1));
    hex = hex.substr(0, hex.length - 1);
    for (var i = 0; i < hex.length; i += 2)
      str += String.fromCharCode(parseInt(hex.substr(i, 2), 16) - shift);
    return str;
}
document.write(heidiDecode('755A5A585C3D8141786B3C385E3A393'));

Genius. This saved me big time. Thank you!

for nodejs and extract host,port,user,password and save to file

https://gist.github.com/an1creator/c1ea0ca5da38253d2e883bc631e4cc64

Nice, this saved me a few hours to find my old password backup
just in case, here is a MSX BASIC version of the code 😎😁

10 LINE INPUT h$
20 st$ = ""
30 sh = VAL(RIGHT$(h$, 1))
40 h$ = LEFT$(h$, LEN(h$) -1)
50 FOR i = 1 TO LEN(h$) STEP 2
60 st$ = st$ +  CHR$(VAL("&h" + MID$(h$, i, 2)) - sh)
70 NEXT i
80 PRINT st$

If you don't believe me, try it on https://msxpen.com/

Here's an online tool version: heidisql password decoder