I like how that blog / website looks with that ASCII header! Often I wish I would come up with such a design. And yes, I also like PNG a lot :)

I've been using this generator for years for ASCII headers: http://patorjk.com/software/taag/#p=display&f=ANSI%20Shadow&...

Oh nice! That seems to be using the tool 'figlet' (or maybe toilet, from libcaca), and the font is banner3-D, that's available here: https://github.com/xero/figlet-fonts

If you install the figlet (or toilet) tool and clone that font repo you can do a :

   figlet -d ./figlet-fonts -f Banner3-D My text
  '##::::'##:'##:::'##::::'########:'########:'##::::'##:'########:
   ###::'###:. ##:'##:::::... ##..:: ##.....::. ##::'##::... ##..::
   ####'####::. ####::::::::: ##:::: ##::::::::. ##'##:::::: ##::::
   ## ### ##:::. ##:::::::::: ##:::: ######:::::. ###::::::: ##::::
   ##. #: ##:::: ##:::::::::: ##:::: ##...:::::: ## ##:::::: ##::::
   ##:.:: ##:::: ##:::::::::: ##:::: ##:::::::: ##:. ##::::: ##::::
   ##:::: ##:::: ##:::::::::: ##:::: ########: ##:::. ##:::: ##::::
  ..:::::..:::::..:::::::::::..:::::........::..:::::..:::::..:::::
Toilet also has colour effects and can output in different formats:

   toilet -E list
  Available export formats:
  "caca": native libcaca format
  "ansi": ANSI
  "utf8": UTF-8 with ANSI escape codes
  "utf8cr": UTF-8 with ANSI escape codes and MS-DOS \r
  "html": HTML
  "html3": backwards-compatible HTML
  "bbfr": BBCode (French)
  "irc": IRC with mIRC colours
  "ps": PostScript document
  "svg": SVG vector image
  "tga": TGA image
  "troff": troff source
Cool!

Edit: added image formats