Why is my toilet overflowing but not clogged?

An overflowing toilet that is not clogged may be caused by a problem with the toilet's float mechanism or a blockage in the drain pipe. The float mechanism may be malfunctioning, causing the water to continue flowing into the toilet bowl and overflowing. Additionally, a blockage in the drain pipe could be preventing the water from properly draining, leading to an overflow. It is recommended to check and potentially repair the float mechanism or clear any blockages in the drain pipe to resolve the issue.