Comment by raffy

I've created a bunch of Unicode tools for Ethereum Name Service (ENS).

https://adraffy.github.io/ens-normalize.js/test/resolver.htm...

Also:

https://adraffy.github.io/ens-normalize.js/test/emoji.html

https://adraffy.github.io/ens-normalize.js/test/chars.html

https://adraffy.github.io/ens-normalize.js/test/confused.htm...

https://adraffy.github.io/punycode.js/test/demo.html

Here is a video of another failure case:

https://twitter.com/adraffy/status/1629262969581473792