convert backslashes to forward in batch files [duplicate]

Answer 1

SET "string=D:\path\to\folder"
ECHO %string:\=/%

Basically, you need first to store the string value into an environment variable, then use the following template:

%variable:str1=str2%

to replace every occurrence of str1 in variable with str2.

You can always remind yourself about this pattern by invoking SET /? from the command prompt.