How to create text style

Hi everyone,

I read on a header file a see the text as below,

 *          __                   
 *         /\ \                  
 *  __  _  \_\ \     __    ___   
 * /\ \/'\ /'_' \  /'__'\ /'___\
 * \/>  <//\ \ \ \/\  __//\ \__/
 *  /\_/\_\ \___,_\ \____\ \____\
 *  \//\/_/\/__,_ /\/____/\/____/
 *

Pls help to give me a website or software can do that job.

Thanks!