How does it compare with utf8proc [1]? I'm aware that Mojibake does a bit more than utf8proc (e.g. bi-di) but that seems marginal to me.

[1] https://juliastrings.github.io/utf8proc/

Not to bikeshed, but isn't the word "mojibake" synonymous with "when character encoding breaks"?

Love the amalgamation approach—the C/C++ ecosystem desperately needs cleaner, lightweight Unicode support without pulling in massive dependencies... thanks for sharing

what's performance like compared to python ftfy module?

I have come to the conclusion that the only Unicode support needed in C is supporting pointers to char and arrays but lightweight C libraries are always welcome.