Windows Command line: Is there any way to check syntax of bat file without actually running it?
Unfortunately a good and extensive checker doesn't really exist.
The only one I was able to locate is BatCodeCheck, which dates from 2014 and which checks for only a limited number of errors.
Maybe you could try to run the .bat in a sandbox enironment. I haven't tried it myself, but start the cmd.exe in a sandbox programm and then try to execute the bat file.
This might work if all necessary files are present.