The standard Unicode library in native OCaml is Camomile https://github.com/yoriyuki/Camomile https://github.com/yoriyuki/Camomile (docs at http://docs.mirage.i

The standard Unicode library in native OCaml is Camomile https://github.com/yoriyuki/Camomile https://github.com/yoriyuki/Camomile (docs at http://docs.mirage.io/camomile/index.html http://docs.mirage.io/camomile/index.html –unfortunately, it's pretty bare-bones). If you're targeting JavaScript with Reason/BuckleScript, e.g. making a ReasonReact app, you will automatically get Unicode support for strings if you use the {j|Unicode string literal|j} syntax (specially provided by BuckleScript).