[cygx]

That tool already exists: https://ballercat.github.io/walt/ - though you have to switch 'tabs' to see the WASM code.

[TekMol]

Yes, I saw that.

It's not the interface that I would like to use. I want to write Walt on the left and instantly see the WasmT on the right.

Also, that tool does not work here. It gives me 'Uncaught ReferenceError: getAST is not defined' as soon as I type something in the code tab.