How to convert large UTF-8 strings into ASCII?

Question

I need to convert large UTF-8 strings into ASCII. It should be reversible, and ideally a quick/lightweight algorithm.

How can I do this? I need the source

Answer 1

As others have said, you can't convert UTF-8 text/plain into ASCII text/plain without dropping data.

You could convert UTF-8 text/plain into ASCII someother/format. For instance, HTML lets any character in UTF-8 be representing in an ASCII data file using character references.

If we continue with that example, in JavaScript, charCodeAt could help with converting a string to a representation of it using HTML character references.

Another approach is taken by URLs, and implemented in JS as encodeURIComponent.