It’s actually possible to print text upside down using a simple CSS property and works cross-browser today. The property to use is “text-gravity” with a value of “inverse”.
<span style="text-gravity:inverse"> write upside down text </span>
… and this is the result:
ʇxǝʇ uʍop ǝpısdn ǝʇıɹʍ
I’m really surprised to learn that so few people know about this property, and I recommend you to continue reading the W3C specification of text-gravity.
Update: Sorry, I lied The above is done with a UTF-8 character generator (see the link the the “specification” above). Amazingly, you can find that most characters have their upside down equivalent somewhere else in the huge Unicode alphabet. Neat trick Here’s another site that does the same thing.