Leftover pizza is safely stored in the refrigerator for three to four days. If it isn't eaten in this time, it can be stored in the freezer for up to two months.
While frozen foods stored at 0 degrees Fahrenheit are safe indefinitely, there is a loss of quality when stored beyond this time. It is important to follow these guidelines to keep foods safe and prevent spoilage due to bacterial growth. Pizza must be stored in an airtight storage container or bag. When freezing pizza, it needs to be enclosed in a freezer-safe storage container to ensure the best quality and to prevent freezer burn.