When to tell I stutter

When to tell I stutter I met someone online and I was wondering what the best approach is to mention that I stutter. I think my stutter is mild to moderate, depending on the situation. People can definitely hear it tho. I was thinking to wait until we meet irl. I don't want to make a big deal out of it because it will make me uncomfortabele because then I know the other person will focus more on my speech. Also I think it makes me look and feel less confident. Any advice?