http://patorjk.com/software/taag/
Example output below:
# _____ _ _______ _
# / ____| | | |__ __| | |
# | (___ __ _ _ __ ___ _ __ | | ___ | | ___ __ __| |_
# \___ \ / _` || '_ ` _ \ | '_ \ | | / _ \ | | / _ \\ \/ /| __|
# ____) || (_| || | | | | || |_) || || __/ | || __/ > < | |_
# |_____/ \__,_||_| |_| |_|| .__/ |_| \___| |_| \___|/_/\_\ \__|
# | |
# |_|Amazing software. Make sure to click “More opts” and select “Echo Commands” under the “Format the output” option.
There are hundreds of formatting options, you can choose your output format for easy inclusion in shell scripts, and you can preview all of the styles at once.