How to read dump files?

kane

TS Rookie
All my dump files as well as others I've looked at in this forum, looks like hieroglyphics when I open them in Notepad, "PAGEDU64 ± `Bï x², øÿÿp& øÿÿP3$ øÿÿd† † ÿ™€øÿÿ H Xþ™€øÿÿ š€øÿÿ€ à¡ï €úÿÿ Y øÿÿ €¡ž €øÿÿ @Œ ÿÿ < <......"

What I'm doing wrong?