Unicode character display iOS emoji on the Internet

There are many applications that accept input from iOS devices, and Unicode characters on these devices are fairly common. Does anyone know of any libraries or resources that would allow these Unicode characters to be displayed as images in non-iOS browsers, or possibly convert them to their closest ASCII equivalent; for example, a Unicode character with a smiley character will be converted to the ascii string ":)". Or perhaps a cross-browser font that I could use that faithfully supports the unicode subset used for iOS emoji icons.

In particular, I would like to be able to display something like the following page, like a cross browser (modern browsers are fine): http://hasseg.org/stuff/ios-emoji/ .

Edit: The solution will preferably be in Python if it is executed on the server side.