XAMPP SSL Tutorial https://shellcreeper.com/?p=2573

make-cert.bat

@echo off

SETLOCAL EnableDelayedExpansion

set /p domain="Enter Domain: "
set OPENSSL_CONF=../conf/openssl.cnf
set tmp_cert_conf=cert_%domain%.conf

del %tmp_cert_conf%

for /f "delims=" %%x in (cert.conf) do (
    set "string=%%x"
    set "modified=!string:{{DOMAIN}}=%domain%!"
    echo !modified!>>"%tmp_cert_conf%"
)

if not exist .\%domain% mkdir .\%domain%

..\bin\openssl req -config %tmp_cert_conf% -new -sha256 -newkey rsa:2048 -nodes -keyout %domain%\server.key -x509 -days 365 -out %domain%\server.crt

del %tmp_cert_conf%

echo.
echo -----
echo The certificate was provided.
echo.
pause