The shelf life for a package of dry Jello powder is indefinite, and the product does not spoil. Pre-packaged Jello can be stored in the pantry for 3 to 4 months past the printed sell-by date.
If Jello shows signs of mold or its color has changed drastically, it should be discarded. Likewise, if Jello has a bitter taste, it should not be consumed.
Jello is a processed food made with gelatin and is available in sugar-free and regular flavors.Learn more about Freezing Food