As far as I know, 0 means 0 in this case. However, since food manufacturers are known to "round down" this could mean "less than 1 carb."

As with all "free" foods, consume in moderation. Artificial sweeteners of any kind aren't that good for the body, even without carbs.

Still, sf Jell-O is a saving grace for many of us. Enjoy--and put on a little dab of real mayonnaise, or whipped heavy cream (easy on the Splenda).