Probably a stupid question but is it possible? I want to create a cool UI for an emulator.
I suppose you could. The binary object would help in decoding rom files. What did you want to try to emulate?
Develop games in your browser. Powerful, performant & highly capable.
Going to go out on a limb and suggest that if you need you ask this question, it's probably not something you will find Construct particularly suitable for.
That said, if you can do it in JavaScript, you can do it in Construct.