Copy the script and make it into a txt file, save it under converter.bat without opening it, now move your image onto the icon of the converter, enter the name png.ico in the converter and it should be take a picture in the ico 

If it doesn't work, I couldn't test it because it's a script for Win11 and I have Win 10 on my 2 PC

But I'm pretty sure it works, I just did it myself and actually know what I'm doing

::script by f3|\*::


echo off
color e
title rename
set 1= &1
cls
goto start
{
:start
if exist %1% goto 1
if not exist %1% goto 2
{
    :1
        cls
        powershell Write-Host 'File load' -fo 'green';
        pause
        echo enter the name of the file
        echo to which the file should be renamed
        set /p input=
        ren %1% %input%
        exit 
        {
             :2
        cls
        powershell Write-Host 'couldn't find file' -fo 'red';
        pause
        exit    
        }   
}
    exit
}

echo off
title loading
goto start
{
::----fang mit deinem script einfach unter dem (:start) an----::
:start



























    ___________________________________________________
    :load
    cls
    echo loading.
    powershell Write-Host '[\______]' -fo 'green';
    ping _n 0.2
    cls
    echo loading..
    powershell Write-Host '[\\_____]' -fo 'green';
    ping _n 0.2
    cls
    echo loading..
    powershell Write-Host '[\\\____]' -fo 'green';
    ping _n 0.5
    cls
    echo loading..
    powershell Write-Host '[\\\\___]' -fo 'green';
    ping _n 0.2
    cls
    echo loading...
    powershell Write-Host '[\\\\\__]' -fo 'green';
    ping _n 0.3
    cls
    echo loading.
    powershell Write-Host '[\\\\\\_]' -fo 'green';
    ping _n 0.2
    cls
    echo loading.
    powershell Write-Host '[\\\\\\\]' -fo 'green';
    ping _n 0.1
    cls
    goto start
}