How do I do a html5 build for a game with entierly C# scripts ?

I have 2 games both using C# scripts . I want to build them in Html5 to put on Kongregate rather than in unity as one currently is. I was lead to believe they could be converted to Java without me having to try and rewright all the scripts in Java . Any idea How I do this, How I get my currently C# projects to a Html5 build?