I have a vbscript that works in development but not the server.
I want to debug this, but I don't want to install visual studio on the server.
What is the most lightweight way to debug this using a debugger?
If you're referring to "classic" VBScript, i.e. .vbs files, Microsoft has a tool available called Microsoft Script Debugger that functions more or less like a Visual Studio debugging session. It's probably your most lightweight option short of adding debug statements to the code.