ASCII, an acronym for American Standard Code for Information Interchange, is a character encoding standard for electronic communication, encoding 128 specified characters into seven-bit integers.

ASCII, acrónimo de American Standard Code for Information Interchange, es un estándar de codificación de caracteres para la comunicación electrónica, que codifica 128 caracteres especificados ...

One answer is Punycode, which is a way to represent Unicode characters in ASCII. However, while you could technically encode the raw bits of Unicode into characters, like Base64, there’s a snag.

Google Unicode has overtaken ASCII as the most popular character encoding scheme on the World Wide Web, Mark Davis, Google's senior international software architect, said in a blog post.

But Chrome and Firefox do not show the Punycode version of the URL by default. For Firefox, showing Unicode domains in Punycode requires users to switch a flag in the about:config section.