I am concerned when considering developing a simple client-application to do it server side or client side. If it's javascript someone could just copy your source code. I don't use any libraries/frameworks right now so it would just be pure javascript/no dependency.

I am thinking of building something and if I did it client side I could avoid potential attacks if I'm not mistaken as no server-side storage/execution is involved. But that concern of literally right-click save page and reupload...

The tool is a put-something-in get something out sort of deal and can be done entirely client side with JS.

Also doesn't seem like it's anything "amazing" or "revolutionary" I just wonder if it's so easy to steal... ehhh cross that road when you get to it.